As for the ban on Jews by some Arab / muslim countries - remember that the west was actively encouraging Jews, with Zionist movements all over the world, to migrate to the middle-east and occupy muslim-Arab territory. Sure, it began with a narrow focus with only Palestine. But who knew where it would stop if it was successful? Most of these countries are former western colonies who immediately understood what the west was trying to do by sending foreign Jews to occupy their land - the "divide and rule" policy was how they were subjugated too in the first place, to become colonies, and the newly independent Arab states understood that by driving Jews to the middle-east, their former masters wanted to use the Jews to foment a conflict between Jews and Muslims which they could then use to break the newfound unity amongst the Arab states and use as an excuse for interventionist politics. It had (and still has) nothing to do with antisemitism and everything to do with making sure that former imperialists doesn't exploit any political vulnerability in their country and endanger their (then) newfound independence. (It also doesn't help matters that Israel acts like a western puppet, further reinforcing the view that Israel is just a pawn of the west in the middle-east).