Well the rabbi is partly right — after Christ takes His bride home. The man of sin will deceive Israel in thinking he is the messiah for 3 1/2 years until he turns on them and brings all nations to the valley of decision against Israel, her God and His Christ. The Lord Jesus won’t come until Israel cries out “ Blessed is He that comes in the name of the Lord and they shall see the one they pierced coming with the clouds and all mankind shall wail.
Yes, fulfillment of Zechariah 12:10.
Jesus, talking in Matthew 24:15 refers to Daniel’s Prophecy of the Abomination of Desolation. It Holds a duel fulfillment since Antiochus IV did the same thing a few hundred years prior.
When The Lord says, flee to the mountains, He is referring directly to Jews living in Judea during the Tribulation with the 3rd Temple already up and running.