Modern jew "prophesy" claims the messiah won't come until all the diaspora are united and brought back to Jerusalem. Getting every country on earth to kick them out while they have Israel to flee to expedites that goal.

Alternative theory: they're so retarded and rejected by God that they can't help but create infinite hatred for themselves. They proudly pronounce the terrible things they've done, thinking people will love them for it. It fuels their destiny to endlessly wander the world. The slightest bit of introspection would solve this, but they are blinded by their self-inflicted curse and their pride.