Trump protesters also don't seem to be aware that they're working for him.
It's a national-scale version of what happened here in Wisconsin. The voters were so put off at the leftist antics in the Capitol, that it turned out the base, and turned the moderates out in droves, and Scott Walker won his recall with a larger percentage and turnout than his actual election.
There's always been a subset of people who are always voting against a candidate, than they are for one, but mass protests of people waving Mexican flags and other assorted asshattery will churn out a voting base of people voting against an entire demographic.
If Trump wins, National-level politics will never be the same. The upside is, that in a way, it'll be more honest, because it's often been a personality/popularity contest more than one of ideology and policy, and for a generation or more, election cycles will be about asshattery and out-honeybadgering the competition. It started in earnest with the first televised debates between Kennedy and Nixon.
The downside of course, is that for a generation or more, election cycles will be about asshattery and out-honeybadgering the competition.