Yeah only 2 generations ago, LGBT people were considered mentally ill. 4 generations ago women were considered unfit to vote. 8 generations ago about half the US though it was OK to own slaves. It takes a while for ideas to die out. That's why US elections turn out the way they do.
The American people are pretty fickle. It won't take long for them to become unhappy with the Republican party. Of course once that happens and you and I are celebrating "Yay! We got rid of the fascists!" they'll be going "Hmm... These other guys are pretty uninspiring. Maybe we should try fascism again."
* There's a big asterisk here that this is all predicted on elections continuing unabated. Which is not a given.