I've just read through this thread... wow. It's an eye-opener to read a rush thread where women were, ah, "encouraged" to pursue or not pursue a given sorority because of their religion. (Not to make you feel old, but you rushed before I was born!)
When I rushed in the early 1990's, religion was - I won't go so far as to say it was totally a non-issue, but it was less of an issue than it seems it was for you. There were four NPC sororities (none historically Jewish, but I believe each had Jewish members) and one newly-founded local whose members were all Jewish... I gravitated straight to the local, which is now a chapter of AEPhi. Off the top of my head, I can think of several Christian alums and one Hindu alum. Times change.
LML,
aephi alum