Most people understand that voting is a way of making decisions via consensus, what people have forgotten is that voting is also a proxy for power. A much better proxy than those which have existed historically, and positively fantastic when compared to directly matching power via bloodshed and violence. 

If people have decided (as Trump supporters) evidently have, that the proxy of voting is no longer working then they can either decide that they have been outmatched in these different arenas, or they can seek other proxies of power to even things out. Up to and including a direct exercise of power, through resorting to bloodshed and violence.