It actually is how this works if protests fail. It wouldn't be the first time violence was required to overthrow dictatorships. The question is if the american people are willing to or able to go that far, and I can say basically without question that they aren't. The people with all the guns are completely in favor of Trump. The Republicans could usurp power outright if they wanted to and just kill any protestors who got a little too rowdy.
The only thing keeping the American experiment together was the pretense of rules and manners, and Trump has gotten rid of all that.