Well, who will have the last word on this one?! There are more views and opinions than there are angles in the compass. I don't like to jump to conclusions, presume, or assume too much, because so much is unknown. From what I can see, however, there didn't appear to be a clear Indication of who had offended whom initially. But it appears to have escalated into reciprocated violence, with both parties trying to inflict injury on each other.
As for Phuket, I enjoyed a little time there a few years back. And I find any occurrences of violence in Thailand, or anywhere, regrettable when there is so much potential for good things to be happening.