This is a bullshit excuse for violence against innocent bystanders. You can (and Israel supporters DO) apply this exact same argument to Israel: "And what exactly SHOULD they do about HAMAS, Mr. Smarty-pants, just let terrorists run pel mel, unpunished?"

I don't have an affirmative answer; if I did I'd be happy to collect my Nobel peace prize. What I do have is the understanding that "but you just don't understand, it's justified when WE do it" is a giant crock of shit, and it's the lie that every oppressor through the ages (including Israel) has told themselves.

Edit: Other countries need to step up their game. It's plain to see what's happening in Palestine, even with the internet and electricity blackouts imposed there, so one can only imagine how much worse it really is. The US and others need to step up and denounce this shit, tell Israel to go to the bargaining table for real or they're off the teat for good.