Actually it's fair to say that the Palestinians are being punished for wrongs done to the Jews by the Germans and other fellow-Europeans.

One of the most sickening things about how injustice and cruelty works is that it is contagious, it get passed on. Treat people badly enough and it twists the way they treat other people. It's happened to the Jews of Israel, and it's happened to the Palestinians. Not to all of them, but to enough to make it desperately hard to imagine a just and peaceful end to it.

The one thing we should always remember when commenting on what people do in these circumstances is that there is no reason to believe that we would behave any better, or as well, if it was us in the situation.