Trumps campaign got off the ground from internet memes and satire groups on places like 4chan and reddit. There’s so many idiots out there looking for something to grasp onto and make their identity. You can’t get a satire/parody group too large or it breaths life of it’s own.
Poes law: without a clear indicator of the author’s intent, any parodic or sarcastic expression of extreme views can be mistaken by some readers for a sincere expression of those views.