The coach is an idiot who admittedly doesn't know his responsibilities to the girls or the school. If he thinks his fans acted appropriately, I'm certainly glad my children will never end up living in a community which tolerates such abuse.
The school's AD should only need to talk to one person, the AD of the host school who was apparently treated no better than the umpires by his guests. I wouldn't be surprised if some of the schools on this team's schedule cancel as they have nothing to gain playing a team with this type of leadership.
The umpire was correct. He tried to be a nice guy and it didn't help. The umpire was wrong in offering to return his game fee. This is something that this coach will hang his hat on for the rest of his life. I can hear it now, "If he didn't think he was wrong, why did he offer to give back his pay?"
The umpire was also wrong in not requesting the host AD to summon the police. A man makes a threat and no one thinks to call a cop? Nope, in today's world, I believe you have to take every threat seriously regardless of how you actually feel.
It is a shame the girls must deal with this, but they don't select the coach. This will go one of two ways. The coach will settle down and learn to control his temper, or he will continue to act in a pompous manner which will eventually ruin the entire season for the team. My bet is on the latter.
I suggest that some of the blame should be borne by this coach's AD as it is apparent they hired a coach who doesn't understand there are a few more responsibilities in HS softball than handing in a line-up card and hollering at umpires. They've got to know I'll battle for them. Yeah, right!