"Beyond the tit-for-tat of "who started it" many are busy debating, it is crucial to emphasize that Israel has illegally occupied the Palestinian territories for many decades, is actively engaging in land theft through illegal settlement expansion, and is imposing a system of apartheid. Under those circumstances, Israel's very posture is offensive, and it cannot claim to be engaging in "self-defense" against the very people whose land it has illegally usurped." (thanks Amir)