She is, but it's such a small facet of her career that even the fen who contributed to the Wikipedia entry for her don't mention it.

Marvel does have a slightly more interesting track record, as the Thing was revealed to be Jewish a few years back, Doc Samson was given a background to mathc his name by Peter David, and Magneto (not a hero, but certainly not merely a villain, either) is a Holocaust survivor. There's also Marvel's Israeli hero, Sabra (who shows up fromt hime to time) and Legion, the (very powerful) illegitimate mutant son of Prof. X and an Israeli named Gabrielle Heller.