Stuff white people like...

@Markyboy Oh yes .. you are right. Wealthy, urban, middle class black people probably DO get offended on behalf of other people. But look at the African continent, the Caribbean? Is there a big anti-homophobia movement there? No. Infact the opposite, homophobia is pretty big in Jamaica, last time I heard!

That's why it's not strictly "white" people, it's a class/wealth thing too.

classic ahistorical cultural ignorance. there wasn't, only a few decades ago, a big anti-homphobia movement in Britain. i'm not sure it's that big even now but some progress has been made. there are very courageous people in the regions you mention trying to bring about similar progress.
and what's this getting offended on behalf of other people? Sounds like Thatcherite there-is-no-such-thing-as-society. Can't one just be offended? it's not the same as speaking on behalf of other people; a lot of which goes on on this very forum. If i hear someone called a Paki it's offensive to me; because it's inherently cruel and unjust, because it makes life less pleasant for all of us. I'm not offended* on behalf* of that person.