Walker out-KG'ed KG. KG has no boundaries when trash talking on the court, but couldn't take the equivalent of what he gives out. It is a bit of an embarrassment for KG. He lost his cool by being out trash talked by a marginal NBA player.
My immediate reaction to something like that is to say that it is sad to see the lack of self control, but it is hard to judge other people on this since brains work differently. I can get really mad, but I'm not going to lash out physically. I would trash talk. That is how it is done on the court and how KG usually does things. I would also take physical shots in the flow of the game that are not going to get a suspension. KG let his feelings about losing overtake him. That is pointless for someone who talks so much trash and can expect to get it back.
I don't care about this long term. It happens. Even Ray Allen and Dooling had a brawl and they seem like two nice guys.