Monster of its own making. For decades the party subtly promoted messages of intolerance, xenophobia, paranoia and fascism. It created a receptive populace ready to have those messages taken unapologetically into the light as a platform. Now the mainstream Republican Party is waving its arms saying, "We weren't OVERTLY any of those things," while several million nuts are saying, "Well that's what you made us."
Reminds me of what happened to journalism in the late 80s. It was respectable, but kept pressing the line of sensationalism. Hard Copy hosted by Bill O'Reilly came on and just tore off the lid and said screw it, give them all the murder, sex and mayhem they can handle. The media shifted and never went back.
Be careful when charming the basest instincts of the human species.