Nobody was banned for being a Nazi. They were banned
for proclaiming
it on their userpage. Which is disruptive. You are welcome to edit
Wikipedia as a Nazi, or as a pedophile, or as anyone else. You are,
however, expected not to use Wikipedia as a platform for proclaiming
controversial views.
What's hard here?
Is everyone displaying any of the userboxes on these pages
http://en.wikipedia.org/wiki/User:GRBerry/German_userbox_solution#Political…
going to banned?
The only reason I can see for treating Nazis differently from anyone
else is because people don't like Nazis. It boils down to banning
someone for being unpopular.
If Wikipedia were based in Germany, it would be an obvious ban for
breaking the law, but Wikipedia is under US jurisdiction, and the US
doesn't have any such law.