ok ok so what if due to weird astronomical things or just a different upbringing, Jesus of Nazareth (who, for the sake of the idea exists, so don't argue it pls) is more violent and radical, a literal king of the Jews who starts a war with Herod in order to recreate the kingdom of Judah
when he fails he is deemed a martyr and due to his miracles being militarial instead of kinda novel, Christianity is seen as a direct successor to Judaism, and the majority of Jews believe he is the messiah instead of just a few
so this underground militant Christianity lasts until Rome collapses earlier and the Jews strike creating the Kingdom of Judah which later falls to stronger Egyptians
the Jews are pushed north and west and end up around the Baltic Sea, where they establish their kingdom again
thoughts on the idea?