Extremely unpopular? The existence of millions of Trump supporters seems to suggest otherwise. They love all that abhorrent shit. That's why they feel like Trump represents them. It's who they really are. Disgusting monsters with disgusting beliefs.
Bigotry and hatred are very much prevalent in the US. You're simply choosing not to see it. It's certainly no paradise and you need to stop pretending it is.
While we're both guessing the future here, I think you are wrong.
Why? Because while a lot of Trump's voters in fact love him for his awfulness
because of his awfulness, a big chunk of Trump's appeal is fake: it's just Republicans wanting the R to win at all costs. If you want abortion to be illegal--and many do--then you are going to say you "love Trump" regardless of what Trump even is.
But all of that will change the moment Trump is no longer a ticket to a majority, which will happen the moment he loses or is termed out of office. In Germany in the 1950s, thousands of former Nazi officials all collectively said, "oops, sorry about that, we'll never do it again" and moved on into German politics. Hitler became, well,
like Hitler in Germany--even though a decade before he would have won a popular vote by a landslide.
The post-Trump GOP will be like this: they will repudiate Trump and join the rest of the US in agreeing about the awful things he did while in office. Not all, of course, and he will always have a cult following (like, um, you know), but the Republican party, wanting to be a majority party again, will join the majority in repudiating him (while maybe blowing a few dog whistles here and there to try to keep at least some of Trump's cult in their tent).