[Diego1618]

Look up any secular history of the region. Babylon was depopulated and in ruins by the time the NT was being written; in fact, for a couple of centuries before.

This is about 15 paragraphs down right here in Babylonian Jewry

"At the beginning of the present era there were many conversions to Judaism all over the Middle East. In about 40 CE, in northern Iraq, the Royal Family and many of the people of Adiabene became Jews. It is estimated that there may have been as many as one million Jews around Babylonia at that time."

[Campion]

No sources or footnotes in there anywhere. "It is estimated ..." by who? Where? Based on what?

In any case, the number of Jews in Iraq in the 1st century is pretty tangential to the question of whether a particular Jew, Simon bar Jonah called Peter, was ever there. It's not really a matter of probability ... the more Jews you have, the more likely that Simon Peter is one of them. ;-)

Peter was in Rome. Mark was in Rome. Mark was with Peter. Peter was martyred in Rome. Mark was martyred in Alexandria a couple of years later. Peter was buried a few hundred yards from where he was executed. Mark's bones were taken to Venice.