Strangely, if a broadcaster referred to someone from China as "a Chinese" they'd probably get in a lot of trouble. Do we need to send you to sensitivity training, too?
I used to live in Taiwan, and I honestly didn't know "Chinaman" was offensive until Steve Kerr said it and got into trouble. I simply thought it was kind of an outdated term to use, but wouldn't have thought it "offensive".
And from what I've heard from black people, I thought it wasn't racist if you were the minority? People should be able to say anything they want about the Chinese and it's just funny, right?
All that said, the commentator should have learned from the Kerr example. You really have to be ignorant to be an NBA broadcaster and NOT know about that incident.