Rebelling against a blockade by slaughtering civilians is still awful abd terribly misguided though.

Yeah, true enough, but oppression breeds extremism and Gazans (and West Bankers) have seen a lot of oppression. It's not necessarily rational, but yeah, when your already horrible life is destroyed because an Israeli airstrike bombed your house and killed your family, most people will be out for blood. If Palestinians get freedom, Hamas and similar organizations will probably be reduced to fringe organizations instead of resistance movements with large amounts of public support. We've seen it in the Troubles.