Now show the states where this happened, and compare gun laws. Normalize for population. I'm genuinely curious if states with tighter gun control have more shootings and no chance for a good guy with a gun to stop them because they themselves can't get guns. To expand, look where good guy with gun did stop it and what state it was in.
Sounds like the guns weren't in the schools. They were out. You're implying that had they been in the school, we wouldn't have had the same level of tragedy.
Context matters. You established that. What was the context in which Elon did his salute?