Hamas makes a great strawman for Israel's military strikes regardless of whether factual or not. Israel can send military aircraft to bomb a neighborhood from above, say there were hamas kids in one of the houses, and Palestine can't do anything about it.

One thing disarming hamas does is remove that excuse. If possible at least - the US is itself a country that only exists because armed civilians fought back against invaders backed by the most powerful military in the world at the time when that military attempted to disarm civilians. And then the US military has itself been driven out of countries where armed civilians became the primary danger to occupation. The whole historic effectiveness of armed civilians against an invading military has been all over the place, resulting in effective invasion one one extreme to sparking the creation of a new superpower nation on the other with plenty of long term violence in the middle (which is where the current occupation of Palestine sits already). Given how well armed and apparently young and angry Hamas is already I don't know if they can be expected to comply with gun control attempts. But failure to comply could result in renewed military strikes against neighborhoods. Also, those Hamas kids are getting some expensive weapons - it seems unlikely whoever is arming them will give up on whatever financial backing they manage to provide.