I think it's because the US is so isolated from any of the wars it does or doesn't get involved in: if the Slovak National Party wins on its "stomp Magyar babies with big hobnail boots, cleanse the South, send them back to the Volga" platform, Orban's sending the tanks; in the US that'd just mean people backing the pro-Bratislava party put Slovak flags on their Twitter Instagram profiles

Tony Poe and Gust Avratokos could play their Apocalypse Now/Charlie Wilson's War games until one day LBJ announces we've been attacked in the Gulf of Tonkin or Manhattan tourists notice that one United plane's flying WAY too low

so in Europe "Nazism" means something specific that means your cities get incinerated, while in America it just means "somebody I disagree with who's sorta loud": it helps that you have a relatively small KKK or Rockwell running around to stay in the cameras

so by 1960 the US was jumping into this "Vietnam" country at the behest of the Laotian Committee for the Defense of National Interests, or in 2016 pouring cash and ammo into the Nureddin az-Zengi Brigade because they were fighting a former ally; backing people fighting for units that grabbed P*lack babies by the ankles and battered them against trees under the Black Sun is just an extension of this whole foreign-policy getup where the decision-makers don't even speak the language of the country they're overthrowing