Reform Judaism magazine just published Part 1 of - well, I don't HOW many parts - on Jews in comics. Part 1 covers the entire Golden Age. I've only skimmed parts of it, but it seems worth reading, if you have the time. Newsarama gave it a good write-up.
Here's the link:
http://www.uahc.org/rjmag/03fall/comics.shtml
And here's the Newsarama commentary on the article:
http://newsarama.com/forums/showthread.php?s=&threadid=5782
I know that Ditko was one of the few early Silver Age artists who WASN'T Jewish. Still, many of the people mentioned here unquestionably influenced him, and this does shed light on the environment in which he worked during much of his career. I decided to post this link here for those reasons.
"Your superior intellect is no match for our puny weapons."
-From
The Simpsons, "Treehouse of Horror II"