It's Dana's choice to ultimately cancel the fight if Diaz no shows, GSP shouldn't cop any flak for that.
Anxiety doesn't really work like that, he's comfortable with fighting, he's definitely not afraid to fight anybody, it's just how he's wired. He is not comfortable with the press though, Nate and Cesar probably kidnapped the bastard to get him to the BJ and Condit press conferences.
I hope he shows, it'll be a great fight. Nick has a better chance than Condit did. I still don't really think he's going to win though