As for the US, it's definitely one of the best countries in the world for Jews. I'm sure if the worst happened, they'd be willing to serve as a haven for - oh, wait. The last time that happened, they let six million die.
Nobody knew at the time that was going to happen, including the European Jews themselves. If they did quite a few more would've gone to countries that didn't limit or even encouraged Jewish immigration, like Spain, the Dominican Republic, Bolivia, Japanese-occupied Manchuria, or for that matter the Soviet Union.
Also, your line of argument in this thread is really great for testing whatever sympathy people have for Israel. I wonder if you're a Palestinian troll.
