Albert Einstein writes:
For me the Jewish religion like all other religions is an incarnation of the most childish superstitions.
I really don't know much of Albert Einstein (just quotes I've read and from pop-culture, really).
But I've always gotten the feeling that he was a very... polite and reasonable man. I never got the feeling that he would inadvertently or accidentally insult anyone. I've always found him to be a man who chose his words carefully and wisely.
For him to call religion, and specifically the Jewish religion, "childish" is quite telling to me. I don't see how this can be skewed in any way.