Since we're not in a .world comm, there were just a lot of fucking Nazis. The US has always been significantly further right wing than it's contemporary nations, at least since the 1800s, but since the 1920s it basically accelerated to light speed. Every minor progressive victory was a half century or more after other countries, and immediately hated by more than half the country; hence why so many rights in the US are tenuous scotus decisions and not laws.
The rest of the world after the 1950s has viewed you guys as the next Nazis. Hell even in WW2 you were only the good guys by comparison, and even then the Soviets were the protagonists of that era with all their flaws.
Only very recently and only in aesthetics has the US really made any strides, and because you chose aesthetics over legislation that progress was easy to destroy. You had a far right wing black president people called progressive because of the color of his skin, you 'legalized' gay marriage without legislation, you had all other companies doing rainbow capitalism to show how open and progressive your society was, despite having the highest wealth inequality in the world – and that's no easy feat, North Korea exists.
The fall of the US to fascism was inevitable, because both the ruling class and the majority populous has always fully supported fascism, they just hate the aesthetics.
They try to be anarchists but they're mostly from western countries so they have permanent programming they refuse to shake off (i.e. calling anyone that doesn't think eurocentric anarchism is the only real left wing ideology a tankie.). Compared to .world's Hillary Clinton though they're like Marx.