I disagree. In my opinion, this is the progression of understanding and maturity:
First, there is hate, discrimination, bias, etc.
Second, there is "color blindness" or "political correctness". Don't say he's gay! Why mention it! I'd better down rank anyone that mentions he's gay! Oh god, don't call that guy a "Mexican" or "Chinese"! We're all the same.
Lastly, there is ACKNOWLEDGMENT and appreciation of our differences, understanding of where we came from, but without letting it lead to hate. This is the most nuanced and difficult place to arrive at.
YES, black people and Asian people and white people are all different. EQUAL,, but different. Let's see our differences, appreciate them, and move on with our business.
The fact is, homosexuals are persecuted the world over, and are still discriminated against today. OF COURSE it's worth mentioning that Tim Cook, a homosexual, is now the CEO of the world's most valuable tech company. It would be unthinkable 20 years ago. The fact that he's homosexual is not relevant to his job performance, capability, etc. But it's worth mentioning as a marker of the progress we've made as a society.