I would hope that describes virtually every post war western government.
And many of them have implemented various levels of 'authoritarian' systems to prevent the (re)rise of Nazis. Ranging from the banning of books in Germany to more mundane things like the British police spending a lot of time and money infiltrating neo-nazi groups and banning them. In the latter case exactly the kind of thing you are worried about happened - the powers granted to the police were also used to target other non-nazi groups like environmental protestors. Despite being very critical of police tactics in the latter cases, I still have no problem with the police targeting Nazis.
Anyway, western governments don't need to raise the spectre of Nazis to gain support for increased police and surveillance powers. They have plenty of more recent things to talk about (from Irish terrorists to ETA to Islamic terrorists). This comment thread is evidence enough for that - there wouldn't have been nearly the same emotional reaction to somebody talking about bombing ISIS.