Nazis aren't being censored, at all. Not any more.
Before the internet, it was almost impossible for Nazi group to get onto TV or radio or in a newspaper. Printing books cost money, and no major distributor would touch such publications. They were isolated.
Now, it's incredibly easy for Nazis to spread their ideas. Any Nazi can set up a website, social network, internet radio/TV station, ebooks, podcasts etc.
And that is gaining them support.