Or are all MTBers Freds? Or are MTBers too cool and inclusive and Kum Bay Ya to use such an elitist Road Nazi label? I consider myself a total MTB Fred of the lowest order. I go into the woods dressed like a road racer with MTB shoes on.
If it makes you feel better, Road Nazis have no particular disdainful term for MTBers. It's like they're some unknown species, you better not F with them, and anybody crazy enough to bomb down single track @ 30 mph is a stoner better left unturned if you know what I'm saying, and I know you do.