I agree with what has been said about a lot of these groups being infested. I definitely would not recommend joining one-we have access to so much power through Satanism, there's no need to take unnecessary risks by joining a group that probably won't get anything meaningful done.
That said, I do think that some of the individuals involved with these groups have been good people. Rockwell, while not perfect, was an awesome leader. He could have sat back and had a comfortable life, and yet he gave his life fighting the enemy in the only way he knew how. Hail Rockwell!