Do you mean this one?
If so, I see that as the equivalent of this (that also mentions Jews, but hasn’t drawn any complaints):
Both of those jokes refer to particular facets of people’s beliefs (not eating meat during Lent; a quorum of Jews required for some observances) and rely on a bit of wordplay, but neither one makes explicit reference to a negative connotation of the beliefs. There’s a huge difference between those two jokes and one that relies on a widely known, negative stereotype.
Don’t you think that’s a little insensitive when we’re discussing religious jokes? 