If you cannot distinguish the difference between riders patting, even vigorously, their horses in celebration after a round while the horse canters/trots quietly along and the horse wheeling around in terror while your son beats it about the head, I’m not sure what value your assessment has. In one of the videos your son was using a crop. Have you seen riders hit their horses around the head with crops after a successful jumping round? Yeah, me neither.
Your son is a full-grown adult. He is a professional rider. He is representing the US abroad as we type. He has accepted HUGE grants of other people’s money from the USEA. All that comes with responsibility whether you and he like it or not.
He needs to come out and make a statement on his own behalf (see: Charlotte Dujardin for a recent example). Daddy coming on here to scold everyone is not only not a good look, ultimately, it hurts his reputation.
And, speaking of the scolding, no, people aren’t obliged to not follow and discuss a major breaking story just because you don’t want us to. There is no ‘rest of the story’ that will make what’s in those videos acceptable in any way, shape, or form.
You son shows signs of alarming anger management issues and lack of impulse control. He needs to address that and do the work to overcome it.
His silence so far is deafening.
ETA: not a reply to @skydy! This is meant for @Wick_McConnon