I dunno, the assumption that the Palestinians would attempt to 'start a genocide' were the roles reversed in the region seems a tad racist, given you know, no support for that proposition in real life and given your distaste for those that have the guts to fight for the land they're being pushed off of.
Um, have you read the Hamas charter, seen opinion polls of Palestinian opinion or listened to what high level Arab politicians across the Middle East say about Israel and Jews? I have no doubt that if the Palestinian side was in control the Jews would be wiped out rather quickly.
I'd also note that a one-state solution is kind of undermined by the fact that that is what we started out with and what led to the current situation.