A) Cliff May is just a mixed up kid. Suing him would serve no purpose.
B) If Gilchrist sued every time he was slandered by Morris Dees and his ilk, he'd spend every penny he had on lawyers. The idea is to protect America's border and its sovereignty, not to enrich lawyers.
What makes him "mixed up"?
The real problem is that what they are saying is probably true. Once a trial got down to real people with names and associations, video tape, It would all come out.