I would partially agree with this, Truth, but more as relates potentially to the Gentiles. The apostasy Paul was talking about in 2 Thessalonians 2:3 is among the Jews specifically, and it will be a mass event taking place all at once. This is because the Antichrist will break the covenant he made with Israel in the middle of the seven years treaty, meaning they will not be expecting it, and when the entire nation is suddenly faced with "Denounce your God and your religion or you will die," the apostasy will be in massive numbers all at once, that is amongst those who do not flee for their lives or are killed.
It runs a parallel with what happened during the reign of Antiochus IV. This is from 1 Maccabees:
Antiochus Epiphanes and Renegade Jews
10 From them came forth a sinful root, Antiochus Epiphanes, son of King Antiochus; he had been a hostage in Rome. He began to reign in the one hundred thirty-seventh year of the kingdom of the Greeks. 11 In those days certain renegades came out from Israel and misled many, saying, "Let us go and make a covenant with the Gentiles around us, for since we separated from them many disasters have come upon us." 12 This proposal pleased them, 13and some of the people eagerly went to the king, who authorized them to observe the ordinances of the Gentiles. 14 So they built a gymnasium in Jerusalem, according to Gentile custom, 15 and removed the marks of circumcision, and abandoned the holy covenant. They joined with the Gentiles and sold themselves to do evil...
The Occupation of Jerusalem
29 Two years later the king sent to the cities of Judah a chief collector of tribute, and he came to Jerusalem with a large force. 30 Deceitfully he spoke peaceable words to them, and they believed him; but he suddenly fell upon the city, dealt it a severe blow, and destroyed many people of Israel... 41 Then the king wrote to his whole kingdom that all should be one people, 42 and that all should give up their particular customs. 43 All the Gentiles accepted the command of the king. Many even from Israel gladly adopted his religion; they sacrificed to idols and profaned the sabbath. 44 And the king sent letters by messengers to Jerusalem and the towns of Judah; he directed them to follow customs strange to the land, 45 to forbid burnt offerings and sacrifices and drink offerings in the sanctuary, to profane sabbaths and festivals, 46 to defile the sanctuary and the priests, 47 to build altars and sacred precincts and shrines for idols, to sacrifice swine and other unclean animals, 48 and to leave their sons uncircumcised. They were to make themselves abominable by everything unclean and profane, 49 so that they would forget the law and change all the ordinances. 50 He added, "And whoever does not obey the command of the king shall die." 51 In such words he wrote to his whole kingdom. He appointed inspectors over all the people and commanded the towns of Judah to offer sacrifice, town by town. 52 Many of the people, everyone who forsook the law, joined them, and they did evil in the land; 53 they drove Israel into hiding in every place of refuge they had. 54 Now on the fifteenth day of Chislev, in the one hundred forty-fifth year, they erected a desolating sacrilege on the altar of burnt offering. They also built altars in the surrounding towns of Judah, 55 and offered incense at the doors of the houses and in the streets. 56 The books of the law that they found they tore to pieces and burned with fire. 57 Anyone found possessing the book of the covenant, or anyone who adhered to the law, was condemned to death by decree of the king. 58 They kept using violence against Israel, against those who were found month after month in the towns. 59 On the twenty-fifth day of the month they offered sacrifice on the altar that was on top of the altar of burnt offering. 60 According to the decree, they put to death the women who had their children circumcised, 61 and their families and those who circumcised them; and they hung the infants from their mothers' necks.
So just like it will in the end-times, the betrayal of the king came suddenly and took Israel by surprise. And in the course of apostatizing, many in Israel started betraying their brethren to their deaths, just as Jesus promised they will again in Matthew 24:10.