The destruction of the temple isn’t “a historical constant” rather an actuality that happened in 70 ad
Jesus prophesied that and that was the Olivet discourse.
The fulfilment of that prophecy was a major impetus pushing the Jesus movement sect of Judaism to dominate Judaism and beyond. This was the formation of the church
I did not say it was but that the events I named were, and that the destruction of the temple in 167 B.C. was what saw the the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place" yet which was a precursor of what was to come, 70 AD did not see what 2 Thes. 2 says must occur, and the destruction of Jerusalem with it cessation of music etc. also has not occurred. Meaning that like as 167 B.C. saw a precursor of what was to come so did 70 AD.
But unlike a fundamentally false gospel like Rome's, souls can be saved even if their eschatology is amiss, thank God.