Were they in the Soviet Union? You could be right, but I find it hard to believe given the indiscriminate violence that was metered out to Jewish communities whenever they felt the need.You are probably right if we take Poland. In the Soviet Union, however, Jews were assimilating rapidly. I would like to know how it was in Hungary, I read it was not too anti-Semitic but am not sure.
I know that in Czechoslovakia, after WW2, the Czechs didn't want Jews returning to their homes. I know this from a museum in Prague. That gives you an indication of the feeling in those countries. Even after what had happened, Eastern Europeans felt Jews were trouble and should be living elsewhere.