I have posted this on the Jewish thread:

I think this thread and the others are a mistake, and inevitably lead to hurt feelings, bad manners, and anger. Justifying it under the notion that humour is somehow a universal healer and we should all be tolerant is perhaps true theoretically, but not in this circumstance. This is the Internet, not your living room, or a small group of your buddies getting together, whatever the ethnic group, and however O.K. it is when you and your group are together. It will be taken badly here. We have no control or ability to signal as a community when people have gone over the line. This kind of thread will inevitably attract grief -- it amounts to what we used to call "coat trailing". It is not censorship if people have the good grace not to get started in what inevitably will cause grief around here.

yours, Peter T.