I don't believe the U.S military was involved with that school massacre. Reports have it that it was some Israeli missile. The U.S would sell weapons knowing full well it could happen but would never (knowingly) do such a thing.

All that said, not sure there should be any sympathy for soldiers bombing any country on the pretext of some "preventive" war.

Do you support the general rhetorical tactic of taking a single example and expanding it to the entirety of a group?

If so, I assume you're also upset about the bad hombres crossing the US southern border. After all, they are killers and rapists, right?