When Neo-Nazis are violent, the actual violence shouldn't be tolerated, but to ban thoughts is something completely different.
FWIW, I never understood why US citizens would carry a Nazi flag, when they know damn well people in their family were directly affected by it in one way or another.
How could communism be implemented without killing people who refused to give up their property, or refused to stop trading with each other?
The highest death tolls that have been documented in communist states occurred in the Soviet Union under Joseph Stalin, in the People's Republic of China under Mao Zedong, and in Cambodia under the Khmer Rouge. The estimates of the number of non-combatants killed by these three regimes alone range from a low of 21 million to a high of 70 million.
All so that people can be equal... equally screwed that is.
It was an implementation of (what it called, though there is debate in socialist circles about the validity of the claim) socialism. Communism is the end-state they claimed to wish to achieve, not the thing they implemented, even in theory.