The signs of the End Times, you say? Sure, I can list a few! Earthquakes, wars, famines, pestilence! Persecution, false Messiahs, false prophets!
Indeed, and they are right there in the Olivet Discourse (Matt 24-25).
What’s more, beyond the actual teaching of the New Testament, there exists an entire industry of people working double shifts, vainly calculating the identity of the Antichrist, the role the USA plays in prophecy, where are they hiding that giant computer in Belgium, microchips and so forth. But even the apocalyptical-industrial experts go blank over one “sign”: for among Jesus’ words, hiding in plain sight, is a characteristic of the End that seems to be consistently missed or minimized, that during tribulation
…many will fall away and betray one another and hate one another…the love of many will grow cold (Matt 24:10, 12 ESV).
“Fall away” indicates that these are professing believers. Persecution comes, and Christians, feeling the pressure, turn on each other. As I have argued elsewhere (click HERE), against conventional wisdom, tribulation as such does not make Christians more caring or more unified – when human nature has its way, people will betray each other in order to survive. As one commentator says about these verses: “What only outsiders had done previously is now said of members of the church: they too will ‘deliver up’ Christian brothers and sisters. Hate, the way the world relates to the church, will also surface in the church.” This Love Recession will not grab the headlines that a war or an earthquake would, but our Lord thought it important enough to warn us about.
In 1-2 Thessalonians Paul “bounces off of” Matthew 24-25, mentioning many of the features found specifically in that gospel and applying them to the harassed Thessalonian church. There is a parallel between the texts when he keeps mentioning the love that Christians must have for each other.
1. 1 Thess 4:9 Paul notes with approval that “Now concerning brotherly love (in Greek, philadelphia) you have no need for anyone to write to you, for you yourselves have been taught by God.” This is language taken directly from the New Covenant prediction, who gives his Holy Spirit to the believer (4:8, alluding to Ezek 36:27 – “And I will put my Spirit within you, and cause you to walk in my statutes and be careful to obey my rules”) and who immediately and directly teaches the believer to love, alluding to Isa 54:13 (LXX): “I will make all your sons taught by God.” The love of one Christian for another, the first-named product of the Spirit’s work (Gal 5:22), is that ability to give oneself for the other, just as God in Christ did for us. It is supernatural and therefore not reproducible by the mechanisms of human psychology. People without the Spirit – unbelievers or apostates – have the unfortunate tendency of “biting and devouring one another” (Gal 5:15).
2. 1 Thess 3:6, Timothy “has brought us the good news of your faith and love” (see also 1 Thess 1:3).
3. Again, in 2 Thess 1:3, “the love of every one of you for one another is increasing,” even as he directs the believers to contemplate the present and future tribulation, the antichrist and the great apostasy of the End Times.
4. But in 1 Thess 3:12-13 he shows himself very concerned that they keep loving one another, even as the Second Coming draws closer: “may the Lord make you increase and abound in love for one another and for all, as we do for you, so that he may establish your hearts blameless in holiness before our God and Father, at the coming of our Lord Jesus with all his saints.”
There are other passages as well:
5. In 2 Tim 3:1-3 Paul reflects once again upon the same forgotten sign: “There will be terrible times in the last days: People will be lovers of themselves…without love” – or as BDAG has it, hardhearted, unfeeling, without regard for others.
6. Later on, in Revelation, the theme reasserts itself. In Rev 2:19 the church in Thyatira was living properly in the light of Jesus’ coming: “I know your works, your love and faith and service and patient endurance.” But in Rev 2:4, Ephesus receives a rebuke: “you have abandoned the love you had at first.” The church is active in God’s work, but the loss of love between its members will inevitably lead to heated friction and internal warfare.
To summarize the Bible teaching: the End Times, while not necessarily imminent, are drawing ever closer; the Christian must hold firmly to love for other believers; we should pray to that end, asking that the Spirit continue to make us and our fellow Christians more loving; in the End love in the church will badly unravel.
When the great apostasy comes (Matt 24; 2 Thess 2:3), those who to the human eye are genuine believers will turn away from New Covenant faith. And when apostasy comes to town, all bets are off: “ex”-Christians and phony Christians will shed the fruit of the Spirit like a dirty T-shirt, to look out for Number One in a world grown hostile. What starts out as coldness toward each other will evolve into gross survivalism once they figure out that they can turn others in to buy themselves fleeting hours of safety. With their rejection of the New Covenant, then will come the darkest of Gentile sins: idolatry (the worship of God’s enemy, the antichrist), fornication, hatred, deception (Rev 21:7-8).
Love manifests itself in the day-to-day life of God’s people. It is not a product of club membership or shared interests: it is a miracle. If our love seems to be choked by bitterness, revenge, one-upmanship; or poisoned by gossip, greed or self-interest, then Jesus’ words on love grown cold should frighten us to the core.
Related Post – “Four Blood Moons” and a False Prophet
 What is the relationship between Matt 24:3-8 and the rest of the chapter? Our view is that Jesus is speaking of signs that will continue throughout the age of the church, even though the end is “not yet”; also, that they will be heightened in the final days. This is also the program laid out in 2 Thessalonians and Revelation.
 Ulrich Luz, Matthew 21–28 (Hermeneia; Minneapolis, MN: Augsburg), 194, emphasis added.
 The parallel verses in Mark and Luke emphasize division within blood families, of a type that occurred from the earliest days of the faith, rather than division within the church: Mark 13:12-13 – “And brother will deliver brother over to death, and the father his child, and children will rise against parents and have them put to death. And you will be hated by all for my name’s sake.” Traditionally the Jews as well anticipated end-time strife within families (Jubilees 23:16, 19 – “And in this generation children will reproach their parents and their elders on account of sin, and on account of injustice, and on account of the words of their mouth, and on account of great evil which they will do, and on account of their forsaking the covenant which the LORD made between them and himself so that they might be careful and observe all of his commandments and his ordinances and all of his law without turning aside to the right or left…Some of these will strive with others, youths with old men and old men with youths, the poor with the rich, the lowly with the great, and the beggar with the judge concerning the Law and the Covenant because they have forgotten the commandments and covenant and festivals and months and sabbaths and jubilees and all of the judgments.”) and also, as in Matt 24, between “friends”: “At that time friends shall make war on friends like enemies, the earth and those who inhabit it shall be terrified…” (2 Esdras 6:24).
 For the same dynamic between the Second Coming and love, see also Rom 13:8-11 – “Owe no one anything, except to love each other, for the one who loves another has fulfilled the law. For the commandments, ‘You shall not commit adultery, You shall not murder, You shall not steal, You shall not covet,’ and any other commandment, are summed up in this word: ‘You shall love your neighbor as yourself.’ Love does no wrong to a neighbor; therefore love is the fulfilling of the law. Besides this you know the time, that the hour has come for you to wake from sleep. For salvation is nearer to us now than when we first believed.” Also in Ephesians 3-4.
 The Bible versions typically do not expand on the meaning of “first love”. An alternate interpretation is that they had lost their love for God (so the Good News Bible; French version BFC); but since the cooling of love for other believers is the theme of much eschatology; and given the emphasis that other Johannine literature places on it; and given too that the Ephesian church is still active for God; for these reasons the theme seems to be “brotherly love” (so Nicholl; also Roloff); Wall and the NLT think it is both love for God and love for others. Strangely, Aune offers detailed observations on the syntax but says nothing about “first love”.
 The Apostolic Fathers vouched for the same truth. Of prime importance is Didache 16.3-4, since it is early and clearly echoes Matthew: “For in the last days the false prophets and corrupters will abound, and the sheep will be turned into wolves, and love will be turned into hate. For as lawlessness increases, they will hate and persecute and betray one another.” In the sermon commonly labeled the Second Epistle of Clement we read, “Therefore let us love one another, that we all may enter into the kingdom of God.” (2 Clem. 9.6). The Martyrdom of Polycarp shows how that saint went willingly to the stake and would not allow himself to be delivered while others perished in tribulation: “For it is the mark of true and steadfast love to desire not only that oneself be saved, but all the brothers as well.” (Mart. Pol. 1.2). All quotes taken from the Holmes edition.
“The Forgotten Sign of the End Times: icy relations among God’s people,” by Gary Shogren, PhD in New Testament Exegesis, Professor at Seminario ESEPA, San José, Costa Rica