Well, if they are putting the blame on the umpire I don’t think that that is right either. It wouldn’t be right if he was a replacement guy and it’s not right if he’s a pro guy. Could he have handled it differently? Probably, but once he gives that warning he has to follow through with it or it will just cause even more problems.
I’m not a pro guy, but I tend to let a lot more inside pitching and HBP go than most before giving a warning. But, I was a bit of a jerk I guess you would say when I pitched. I did peg a guy in high school once while I was warming up.