Start with understanding the premise that Americans are violent as a rule , and therefore will act out violently for the smallest reason. I understand it from their living a culture of continuous wars. That's a sizable proportion for the reason they have so many mass shootings, along with the fact that far too many are packing guns.
We Canadians can be helpful in helping them to understand what is normal. We don't become violent over the slightest cause, and especially not political cause! Contrast our trucker protests that went on for weeks, to their violence during the Jan.6 coup attempt.