Well you could ask him, but his name is now puke tan on the forum, so he's really banned from it.
If you haven't noticed yet, Kappa is relentless as a pit bull when he thinks he's right. Whether he is right or wrong is immaterial (the truth is usually someplace in the middle); he knows he's right, Zup hurt his feelings, and despite all his griping and his shenanigans, he truly wants to be here.
Frankly, with all the sophomoric, abusive, and offensive stuff that I've seen on this forum and on the chat channels, and the childish, unsportsmanlike game play . . . I'm puzzled as to why Kappa is "the one", when so many more behave as bad or worse than him. In the end, it's Zup's game, and he can handle it as he sees fit.
I'm guessing that even if a small legion of us signed up to be the Kappa-police, we would all tire of rooting him out long before Kappa tires of beating "the man".