The recent horrific car bombs in Iraq, targeting an obscure religious sect that presumably doesn't meet some Muslim clerics' standards, illustrate a point about Israel that bears being made explicit:
If Israel would do all the things that the Left demands - if Israel would take down the fence, if all Palestinian Arabs were allowed to move where they wanted to in Israel, if Israel stopped all raids and arrests and roadblocks, if it opened the borders to Gaza - then the Jewish sections left in the area would look the way Al-Qataniyah and Al-Adnaniyah in northern Iraq look today.
The interesting thing is that, intellectually, the Left must realize this. They might mouth predictions that Israeli concessions would bring a happy, peaceful Palestinian Arab society in its wake but no one can seriously believe it. The Jews would be treated far worse than the Yazidi were this week if the terrorists are given half a chance. The unremitting terror attacks from 2001-2004 in Israel is proof of that, and if Hamas and Fatah had access to bigger and better explosives, they would have used them as well.
Even given these obvious facts, the Left seems to prefer an insecure, terror-ridden Israel that meets their standards of "morality" to a state that actively protects its citizens from the surrounding, hostile millions. They would prefer the inevitable resulting mass murders in Israel to having Israel do anything defensive that might, possibly, violate the "rights" of anyone else.
Is it anti-semitism? Is it self-hate for Western culture? Is it the complete absence of sense? I don't know, but whatever it is, a clear picture of what they advocate can be seen today in Iraq.