Locke took the Kanter comments VERY personal. Right after the Kanter was traded there was a Jazz "chalk talk" they call it where they give season ticket holders lunch and have someone come speak. Locke was there this time and talked a lot about Kanter. He was very sympathetic toward Kanter, talked about how hard the Jazz tried with him, but that Kanters agent just brain washed him. Said things like "I feel so bad for Kanter" because he doesn't have friends and has such bad influences. So Locke has basically done a 180 since Kanter came out and bashed everyone. I think it truly shocked Locke that Kanter would act like that and say that.
Kanter is just a narcissistic dimwit who loves attention. He would have been the class clown eating dirt for attention in elementary school then once he got a new "friend" would claim everyone made him eat dirt.