Good bit of study! Keep in mind, what starts the tribulation is the Jewish covenant with the Anti-Christ (Daniel 9 and Isaiah 28). It is in the Middle of the 7 year agreement that he breaks the covenant and the Jews with understanding flee to Petra (Revelation 12 and Michah 2:12). I hope we are raptured before this covenant, but it is possible...
There is one VERY INTRIGIUNG lien of thought regarding the Seven Year Covenant - IT DOESN’T SPECIFY ISRAEL.
One school of thought says the covenant is between not the Antichrist and Israel, but rather between Russia and Persia - and the Antichrist will come from Persia, not Europe.
I found that worthy of further study...