Why the Left-Right schism on Israel? (Pat Buchannan not withstanding)

[nomoon]

I’ve been baffled at the schism between the Left and the Right on in the Israeli-Palestinian conflict. The Right is generally supportive and sympathetic of Israel, while the Left tends to be much more supportive of the Palestinians. How did this come to be? Is there anything in the core values of either philosophy that would logically align them with one side over the other? I can understand the Libertarian tendency to lean towards non-interference, but Libertarians tend to be neutral on the issue of which side is “good” or legally correct.