I saw on Discovery/History and right now, it is in the magazine “World War II” (or the similar magazine, “America in World War II”) on the newstand now, that America definitely had real Nazi sympathisers back in the 1930s.
Somewhere back east, NY or Pennsylvania; was like some sort of camp.
One searches for this on google and you get too many hits on all sorts of subjects, mostly left wing or wacked out skinhead stuff.
Oh, this link, http://www.bytwerk.com/gpa/naziimages.htm with a picture from Chicago way back in 1931 does confirm this.