Everyone, including the ISD brass, knows darn well the official did not say say anything remotely racial.
If this were a situation where players got up and then shoved an official after he supposedly said something, then yeah, I'd want to look into that further. In other words, an incident that occurred IMMEDIATELY after the alleged remark. Are you trying to tell me that the kids blew it off, then got together in the huddle LATER (even if only a play) and decided to retaliate by a full force run?
Also, look on the video of the actions of the MF player -- the one that runs up thinking he needs to block the first kid that hit the umpire. The FIRST thing he does when he sees that is point it out to another official to get a flag thrown. That's how kids (in general, but especially now) behave -- they look to convict someone who has done something wrong immediately. IF there was anything racial said, the first thing the kids that heard it would have done was immediately report it to the coach.
All this crap came out later.