I have understood the abomination that causes desolation as three possibilities: 1) An event that has already transpired when the Greek ruler Antiochus Epiphanes desecrated a pig on the altar in the Jewish Temple around the 2nd century BC. This event is recorded in the Book of Maccabees; 2) An end-time event that has yet to occur prophesying a future evil dictator commonly referred to as the Antichrist; 3) A combination of both.
When the Anti -Christ desecrates the Altar in the Jewish Temple by declaring himself God.
I would have to first maintain that the rebuilt Jewish temple is holy apart from Jesus Christ. It is just this that I cannot comprehend.