First off, what makes Israel's efforts/existence legitimate but Hezbollah's/Hamas's/Houthi's illegitimate? To start with Israel is an occupying power (illegally by definition), a bully and a terrorist state (by the historical record), so any counteraction to such depravity certainly has more legitimacy.
Second, you mention the children casualties, after the Majdal Shams attack, in the Israeli-occupied Golan Heights. You should know that the Druze community despise the Israeli government and asked that no government ministers attend the funeral. But you try to use their deaths as a pretext for more deaths. As if the more than 40,000 direct deaths (the number of indirect deaths is possibly in the hundreds of thousands) of civilians and children in Gaza weren't enough. That's just for starters.
I'll add a third point and stop here. If similar measures were to be taken to make sure that the state you support will never again kill or terrorise, Israel would be no more
Why go to college and develop critical thinking when you can just accept the doctrine of state capitalism and make money for the big guys leeching off the state and weakening our institutions?
[1] https://twitter.com/TaylorOgan/status/1859149340897628545