I feel like you’re being deliberately obtuse, or just trying to be adversarial for the sake of it. His point is that what was going on in the asshole’s head was that he was stopping an active shooter situation. He thought that because he was a moron. Had he not had a gun, the moron couldn’t have murdered people.
There’s always going to morons, so the problem here is that he was allowed to have a gun. Unless your position is that morons should be euthanized, then you must agree that the solution is gun control, or that morons murdering indiscriminately is 👍