Well, there was that thing about 60 years ago in Central Europe,
So one could understand why a Jew might be just a leetle bit sensitive, and be tempted to do the Yossarian. ( Walk around backwards with hand on pistol while trying to look in all directions at once) That said, if I get annoyed by something a Jew says or does to me, which word or deed is stereotypically Jewish, and say so, that doesn't mean I want to murder him and everyone who shares half a gene with him. It doesn't mean I'd exclude him from society, refuse to do business with him, not greet him cheerfully the next time we met, not give him CPR if he fell over and stopped breathing, etc etc. Am I not allowed to laugh at Jackie Mason's jokes because I'm a Gentile? Hell, I suffer from Scotch-Irish jokes, and had ancestors who suffered from deadly S-I "jokes". I dunno, I seem to have been a misfit minority of one my whole life, not exactly fitting into any group. Belonging to a cohesive group may attract nasty attention from envious outsiders, but it has its good points too, as everyone knows. (I believe that's mentioned in the Bible)
Gee, why did I feel compelled to explain myself so much? Internalized anti-anti-Semitism or something? Why can't I be philo-Semitic most of the time without getting raked over the coals if I get up on the wrong side of the bed now and then and make a grumpy observation about my Jewish neighbor? Hey! some folks are just grumpy! Could it be -- Jew Envy? (I wish I was one?)
To get back on topic, I don't think slightly-grumpy-from-time-to-time American Lapsed Christians are the enemy here; what you need to fear are the loony Mohammedans. I say loony advisedly, "Allah" started out as the Moon God. Oops, here comes a fatwa.