I'm not sure it is entirely accurate to frame the US's expulsion from the UNHRC as entirely about Israel. I don't think that's what you're doing, but it's a strong possibility that someone unfamiliar with the situation, reading quickly would. Certainly, you can argue the point; I would argue -if I remember correctly, I'm going to have to go look this up - that it had more to do with the war in Iraq, and the very recent discovery of the abuses at Abu Ghraib. That said, I would not be surprised if the UN was frustrated at the US's sometimes knee-jerk support for and defense of Israel; I'm not going to say that it's a bad idea to stick with our strongest, most stable ally in the region, no matter what, but I wonder if Israel was someplace else of much less strategic importance, how much help and support we would give them "on principle."