like I said, I haven't seen the call that started the problem, but watching a swing,catch,drop,fair or foul etc, is difficult and as a beginning umpire not all calls as easy as they look. I still want to know how the runner got to second base, because I bet that is the umpires fault. There are at least 2 field umpires that could have called a dead as well, by didn't, so it must have not been blatantly obvious. The umpire didn't think the ball hit the batter obviously and that's what they are paid to do, call what they see. Sometime they are wrong and most times they are right. I learned to play through a bad call here and there and to not complain about. Burnett complained with a blatant gesture that is far worse than yelling, because the whole stadium could see it. You show up an umpire he has every right to yell back. Yes he acted a fool but there was no restraining or charging.
The catcher probably made it worse by blocking him. If he walked 5 feet out and pointed is that okay? Ir should he just toss him because he showed up an umpire and argued a strike call? What was the umpire really supposed to do besides throw him out?
