There were some issues in locker room, there always is after a coaching change. Players that were recruited by CBJ had been told things that they knew were no longer promised and that tends to erode their confidence and buy-in to what the new coach stands for. As far as the fight, that happens when you have a lot of Alpha males on a team and they don't see eye to eye. The ones who are bought in and want to see the team succeed will push harder through adversity while those who don't believe in the new coach will quit. There is also the issue that if they have not been held accountable from a character standpoint that their bad attitude will only be made worse by losing. The players that were all in must also have been frustrated at the end of a long season that had gone so poorly.
The most important part of all of this is the way that the team responds to these kinds of issues. The leaders on the team have to step up and overcome the issues that led to the fight and the disagreement. They leaders on the team are the ones that bring everyone back together to follow the coach and stick with the program. The coach can do a lot and is vital in the mentality of the team, but he cannot do it without the leaders of the team behind him. If CJP is as good as we all hope he has the hearts and minds of the team and they will come out stronger after the fight than they were before it. Sometimes guys need to fight and get over it to be stronger and work better afterward, it is the way that teams work sometimes.