There were many Jews in Israel before it became a state, in fact they were offered the land that they were on for a State, just like the Palestinians, only the Palestinians rejected the offer. It's pretentious to say there were no Jews there before it became a State then try to single out specific groups that you want to "send back" after there actually was a State. Many of the Jews that were there could trace their ancestry back to biblical times, does that mean only your specific chosen Jews must "return" to Poland or do you want them all to leave because some of them came back after a State was created?