He said he wasn't a homo, interpretation 'I'm not gay". Stupid joke at an emotionally high time. He thought it was a cute old joke, something 'kids' say when they say an eye raising comment about themselves. More junior high than high school.
The NBA did the PC thing, but there is no story. Unless the world has changed, homo is not a slur, its short for homosexual (i.e. one way). Please explain to me the offensive part when someone says they only like women but in a different (i.e. in his case, not funny) way.