Here's an example of how it could've gotten way out of hand quickly.
Take a look at these lyrics...
https://bit.ly/2L3sLtW
Lil Jon was still popular at the time, so imagine this song (or another song like it) is playing in the dressing room. We don't know if this is the first time it's being played, and we don't know if it's the first time being addressed... but a song such as this could possibly have been the type of song in question.
In a moment of extreme frustration, Peters lashes out against the music, pointing out his issue with the lyrics. He does it in an incredibly insensitive way, but he does it.
It could very well be that Peters saw what he was saying as an attack on the music itself.
But to Aliu, when he heard "turn off that n----- music" he took it as "turn off that music, n-----"... which left him in shock. Rightfully so.
Oblivious, Peters could have feasibly seen this as his way of showing how offensive the music was to himself. Who knows?
Should he be fired? Absolutely. No walking back from this.
But there's also a very plausible explanation for this that allows both parties to be harmed by a miscommunication.
Now, the letter states that he apologized to the room. Aliu didn't mention that in the tweets nor in the TSN article.
It's arguably more likely that Peters stupidly called n----- music, on account of the amount of times that word was used in the song, than some deep seated evil racist rage.
Remember the episode of the Simpsons where Homer grabbed that gummy Venus de Milo off the babysitter's butt... and the whole world came down on Homer thinking he was some sort of monster?
Now, this doesn't explain the kicking and the punching... but what does wrap it together is a man with anger management issues, and woefully inept racial sensitivity.
He has coached players of colour at every level. This is the first and only charge of racism made against him. It's serious. But it could've been way, waaaaaay worse... had he actually said, "turn that music off, n-bomb". The reactions on social media sure make it seem that's what he actually said.