Simply apply this old quote whenever you hear an "alt-righter", a "white nationalist" or a "teabagger" talking, and replace "duck" with "nazi": "When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck."

It's not exaggerated rhetoric when you call out that the core ideals of these groups equate those of Nazism (or fascism, but the distinction is really nitpicking). It's simply new words for old hate. These groups and their friends and supporters are as dangerous as Hitler was before rising to power!