Same reason they're attacking universities, medical research labs, power stations, bridges, hospitals, paramedic teams, civilian rescue teams...

It is amazing how readily some people believe we target civilians, often based on the words of actual terrorists.

With this particular incident with apparent US strikes on a school adjacent to a military complex, and formerly part of that military complex, you would think it must be obvious to any reasonable person that we did not knowingly target a school.

Yet here we are.