Well, sure DG, I've seen that--I once worked with a Jewish picture framer who, if you had to ask him to re-do some sloppy work, would go off muttering about how after thousands of years of persecution, he's not surprised.... It was hilarious. You can resent a slander without trying to parse it.

But unless you have some worries about yourself, I think you just have to stare it down. What else are you going to do? Arguing it out only gets worse, like a piece of tape on your finger and you try to get it off and it sticks to your other hand and etc. In the example you raised I'd just stick to free speech issues and ignore the Jewish/race/ belief/Sammy Davis jr etc., it's like a Zionist infection. You'll end up with Lincoln, who was not a Jew, but rejected Jesus, does that make him vaguely Jew-ish? You'll be trying to figure out Dylan's born again stuff--Dude, turn back! It's beside the point, one hopes. So leave it there.