"Then they do not have what I consider appopriate freedom of speech." True
"Glad I live in barbarism then" Well. Up to you. Personally I am happy that they are not able to rape and burn again like they did in my village (probably the SS Handshar, bosnian Division) not so long time ago.
"Unless and until such individuals attempt to deny other's their rights, or incite violence". Er, that is pretty all the Nazi program isn't it? Racism, extermination, slavery and violence as a tool of power. And here nobody can pretend it is just a talk, a platform, because it is exactly what was implemented...
So actually, at what point will you take action to prevent things to start again? When they will take power? Or when they will start to reimpose racial laws? Or building the Camps? Or terrorizing opposition with Storm troopers? Beating up? Deadly Accidents by too enthusiastic members? Just asking....

"on par with Holocaust denial" Pair, not par. Going together: Holocaust deniers are in fact trying to diminish Nazism murders and increase Communist one in order to make Nazism acceptable...