Well, a careful reading of scripture will tell you that
1) At the beginning of the 7-year tribulation there will be no Christians on earth at all because we will have all be taken up by the Lord who will, as promised, save us from the wrath to come - the 7-year tribulation.
2) This being Daniel's 70th week, God's attention once again turns away from the Gentiles on earth to Israel, who will all be miraculously saved but, except for the remnant, will be slaughtered by the Assyrian beast.
3) "And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate." Daniel 9:27.
"And arms shall stand on his part, and they shall pollute the sanctuary of strength, and shall take away the daily sacrifice, and they shall place the abomination that makes desolate." Daniel 11:31.
"When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso reads, let him understand:)..." Matt. 24:15.
Who is this "abomination of desolation"?
"Therefore thus says the Lord God of hosts: 'O My people, who dwell in Zion, do not be afraid of the Assyrian. He shall strike you with a rod and lift up his staff against you, in the manner of Egypt. For yet a very little while and the indignation will cease, as will My anger in their destruction'." Isaiah 10:24-25.
The actual person himself will only be revealed after we are taken up by Jesus in what is called "the rapture" along with the departure of the withholding power of the Holy Spirit, but scripture seems pretty clear he will be an Assyrian. Also the symbiology of Islamic Jihad and beheading during this time cannot be ignored.
Although some of what you say may be correct, it is encapsulated in an understanding that is incorrect. Your overall view is not scriptural. If it were, then it would have been the common Christian understanding from the days of the Apostles. The view you’re espousing is very recent.
The idea that Christians will not experience the reign of the anti-Christ is illogical since the whole point of his existence. Also, the anti-Christ will most likely be Jewish in background - so he can better pass himself off as the Christ.