Republicans certainly don't stand for everything America stood / stands against. You must be drinking some media kool-aid to believe that. Your Mein Kampf comment would seem to support that.
Sorry to chime in so late, or at all, but I have a different point of view about the state of the two major political parties. When I was younger (late teens / early twenties) I was anti-establishment and mostly liberal, as a lot of young adults are. As I have grown older, I've shifted from my left of center position to more right of center. I'm still moderate by almost all rational definitions. I'm not a republican, nor a democrat (never been either.)
But I find myself more in alignment with republican stated ideals (note, I said stated, not actual, as the two are not usually all that close, for either party) than democrat politics these last four years.
I thought I had changed, but realize that it's the democrat party that has changed.
Democrats used to be suspicious and untrusting of "the man", particularly in the form of big corporations, and govt agencies like the DOJ, FBI, and certainly the mainstream media, etc. Now they are all for them; they automatically believe whatever these people say to us, particularly if it's against Trump. I'm still dead square against "the man", who it now turns out, is a liberal who loves big tech companies, and their censorship.
Democrats used to be in favor of free speech, and would get radical to protect it against a govt and corporations that were trying to shut that down. Now, they're against free speech, and in fact, have swung over to the other side and are not only against free speech, but attempt to coerce speech. They're anti-free-speech. I'm still 100% in favor of free speech, no matter how repugnant.
There are many more examples, but I'm sure you're bored already, if you've even read this much. Bottom line, republicans (but only under Trump) have changed, and are now the party of the working class. Can they hang on to that post-Trump? We'll have to wait and see. And although I've changed a bit, at my core, I'm still the same anti-govt, pro-free speech, freedom lover that I've always been. The democrats have changed a lot, and are no longer the party of the working class, and are absolutely not the same, philosophically, at their core. Nowhere in the democrat party of today would a 60's era liberal icon like JFK find any audience for his famous 'ask not...' statement.