Pathological hatred of everyone south of the Mason-Dixon line aside...
Aren't we giving these retards just a little too much credit? They aren't truly Nazis. Being a genuine Nazi was pretty hard, since death was but a dictator's whim away and you actually had to do awful, awful shit if you wanted to stay in the club. These assholes today are neo-Nazis, which means they've co-opted the parts of Nazism they like and left the rest -- you know, the tough stuff -- behind for a variety of reasons. They're hardly as frightening or as dangerous as the Nazi label might imply. This latest incident was terrible, to be sure, but it appears to have been the work of a single asshole. As a group, they're a long way from committing genocide or doing anything else beyond shouting on street corners.
This group of wannabes is seeking attention. They're getting it. See them for what they are.