When you're a politician you should be aware of things like what happens when you hire a bunch of undisciplined, powertripping-hungry goons with no background checks and unleash them on the population with guns, no training and the general impression that they are righteous and can get away with doing anything they want.

There is a reason why the military forces people through a tough basic training designed to instill discipline before they're left alone with enough firepower to kill a whole village.

What ensued was perfectly predictable. Trump was too dumb to predict that this would look bad on him and wanted to give an image of a "tough president" anyway so he let the problem get worse. But I can guarantee you that whoever organized this knew exactly what they were doing. They wanted to create an environment of terror and set all the pieces for it to happen naturally.