

Possibly the opposite.
There were plenty of little Nazi groups around the United States before and after WW2, but they weren’t allowed in polite company after the war. Not even among conservatives. Some of them stuck around using anti-communisim as a cover, but they were usually asked to leave if the mask slipped too much.
The Greatest Generation fought Nazis, and they weren’t going to let overt ones have any political power. They may not have had sophisticated ideas about what a fascism is (Ur-fascism wasn’t even published until 1995, most people still haven’t read it, and it’s not even the final word on the subject), but they weren’t going to ally themselves with overtly ideological ones.
The Greatest Generation is also dead enough that it no longer has much political power. Just the situation the mask-off fascists have been waiting for.
There should be a Poison Ivy movie of basically that.