Earlier quoted context omitted.
It's probably a consequence of the media. Proclaiming yourself a nazi is still an easy way to provoke outrage and get media attention in America, so attention-seekers abuse it. Also Americans value free speech over most things. Proclaiming yourself a Nazi in Europe would probably have more severe consequences socially. In Germany it could land you in prison.
> In Germany it could land you in prison. Proclaiming yourself a Nazi shouldn't. Expect to be watched closely by intelligence services though (unless you're a cop, very different rules apply then). Promoting the ideology may land in you in jail, depending on details (after a series of trials ending in fines because we believe in measured response).
Maybe I should have said "face criminal penalties" instead of "end up in prison".
[1] https://en.wikipedia.org/wiki/Strafgesetzbuch_section_86a