There are schools located on US military bases, not just near. That doesn't make them viable targets. You better believe that if an attacker hit a school on a US base, the soldiers wouldn't forgive that so easily.
This is about the most horrific thing my government has done in my lifetime. It's hard to even process. In any other context I think we'd call it terrorism.
That the government also does other horrible things does not negate the argument. I am not sure why you would bother saying that. This one is literally a war crime.