Israel has very few friends in this matter (do they have any other than the U.S.?). A lot of blaim is already being placed on the U.S./Bush for Israel's actions (which doesn't logically follow through, but logic isn't the strength of some of these people). The U.S. is trying to support our Ally Israel but doesn't want to incite more anti-U.S. anger in the region. Why can't you understand that?
