Rondo is just one of several guys on our team who loves to talk trash. I'd prefer that the talking stops when the game is over, but inevitably there's going to be some spill over.
Rondo is fiery and competitive. He needs to reign that at times (i.e., you don't want to be getting into it with Kirk Hinrich), but overall I'd prefer him to be too aggressive rather than too timid.
That being said, I didn't see the altercation, so I can't really comment on it with any specificity.