I obviously didn't live during the 30s or WW2, or the cold war era, but I find it pretty stunning that although Nazism and *Marxism-Leninism were extremely powerful forces in the world, and did manage to overwhelm several nations, and did actually exist in an organized fashion in the US, these ideologies never seemed to have a chance of truly taking hold here. But Trumpism did.
Nazism and Marxism-Leninism were so antithetical to [white] American values that the chances they would spread seemed pretty low. They didn't make any sense, they actually felt wrong from a logical and emotional standpoint. A dash of propaganda helped to keep them at bay of course, but I feel like they would've faded away on their own. But Trumpism, man, that stuff is wild. It sort of bypasses [white] American "values" and actually prays on emotional realities: We value inclusion but have an emotional and real history of segregation, we value liberty but have emotional and real history of denying it to certain groups in order to ensure it for others, we value justice but the emotional and real history is that we've applied it in unfair ways.
An example is how when I was a kid my parents told me that Miamisburg doesn't like black people, so naturally any time I saw a black person in Miamisburg I immediately thought, "What are they doing here?" That's pretty ****ed up, but that's the real values of a lot of [white] Americans no matter what is written on a piece of paper or what they say before the flag. These ideologies are burned into the back of [white] Americans' minds, no longer allowed to expose themselves as society evolves, but the thoughts still pass through from time to time, and Trumpism targeted those thoughts so precisely that it emboldened tens of millions of [white] Americans to stop hiding them and bring them to the forefront. Not just to think those thoughts in passing, but to say them out loud and act on them like it's the 1950s, or 1850s for that matter.
Half the globe was once dominated by communism, stripped people of their human rights, stripped them of their property, stripped them of wealth, education, freedom, everything, but it never sat right here. Apparently we were too absorbed by our hatred of otherness to let it creep in, and somehow Trump managed to fan that flame into 74,000,000 votes. Pure insanity. This will go down as one of the darkest eras in American history. My friends' kids will read about this in middle school ten or twelve years from now assuming their schools can afford new history books by then.
*Apparently describing variations of communist ideology is like speaking German, you just slap another descriptor on the back and suddenly it makes sense.