The original poster misses one important point. Israel illegally occupies land that belongs to the Palestinians. International law is clear on this (backed by security council resolutions 194 and 242), Israel cannot occupy land taken by force. Israel has moved over 200,000 settlers into land that DOES NOT belong to them, and then uses this as an excuse to militarily defend those settlers. This being said, the Palestinians are justified in using force to expel an invasion of their land. This does not even begin to touch on the right of return of the original 700,000 Palestinian refugees or the status of East Jerusalem.