Here's what I don't understand... say if Mexican terrorists were sytematically targeting the United States by launching rockets over the border, kidnapping US soldiers, sending suicide bombers into US grocery stores and malls... would the US then not have the right to launch a military incursion into Mexico?
One thing I will say in defense of Israel is that its actions are always viewed through a microscope and judged by sticter standards than that of other countries. This however is something the Jews have brought upon themselves, as they claim to be the harbingers of morality to the western world, yet their religion is based an apartheid system. So because of their alleged heightened morality (which they claim themselves from a societal/ religious perspective-- see books like "The Gift of the Jews") that Israel's behavior is viewed with greater scrutiny.
The Arab world has sprouted a vicious anti-Semitism that would make Hitler blush. The Protocols of the Elders of Zion were being openly distributed at the 2001 World Conference against Racism in South Africa, just days before the attacks on the Trade Center and Pentagon.