medjuck,
I was referring to some of Kenton's comments regarding race that can strike a person as... um, perhaps "racially insensitive" is the right word? After a quick Google search, here's an example of the sort of thing I'm talking about -- from an article on A Blog Supreme:
Accusations of racism also plagued [Kenton]. Annoyed by the exclusion of what he felt were worthy players in the 1956 Down Beat critics poll, he sent a telegram to the magazine protesting on behalf of "a new minority, white jazz musicians." Though Kenton regularly employed African-American musicians and professed friendship and admiration for black jazz pioneers, he never fully shook the stigma.
This Down Beat quote is just one example. The are others where he showed a similar sort of "tone deafness" (at a minimum) when it comes to race. I'm not gonna bother to dig them up. Besides, I'm not making a case that Kenton was a racist. I'm just saying that plenty of non-musical factors played into some people's distaste for the man.