Yes there are some neo-Nazis around. They often openly identify as neo-Nazis and common features are holocaust denial, use of Nazi symbols and admiration of Adolf Hitler.

Neo-Nazis are terrible and often very stupid people. But trying to censor what they say actually helps them. The American Civil Liberties Union says:

“Censoring so-called hate speech also runs counter to the long-term interests of the most frequent victims of hate: racial, ethnic, religious and sexual minorities. We should not give the government the power to decide which opinions are hateful, for history has taught us that government is more apt to use this power to prosecute minorities than to protect them. As one federal judge has put it, tolerating hateful speech is "the best protection we have against any Nazi-type regime in this country."