Whilst I certainly agree with your sentiment about walking away from a fight etc, the problem here is we don't know what happened in the first place.
The Thai guy may have thrown the first punch, we just don't know.
Why the driver of the Porsche is still in custody is disturbing, he did not get involved, he was a bystander, like others there.
He may have been arrested initially for possible DUI, but I think that has bees discounted?