Clicked on a random one, Igor Tamm - Wikipedia says that "some sources" describe him as Jewish. They're all print books, and I'm not willing to grab them all to settle a meaningless internet argument, but I'd wager that he was not considered Jewish at the time.
In any case, alright; some Jewish scientists did fine. Others didn't. We can praise the things the USSR did well without white-washing its history altogether.
Arguments much?