They threatned Israel israel in her wars with her Arab neighbors, that if Israel continued to pound the arab countries the Russians were going to send submarines in and personally go after Israel. Israel backed off too. I think israel is a lot stronger now than she was in 1967 or 1973. Matter of fact I read that Israel has a lot of her nuclear arsenal aimed at the soviet union.
I personally don't think russia is strong enough to invade israel and kill off the Jews. i think the Russians would be in for a big surprise