I don't see calling BME men and white men "men" as being the same thing as eliminating all differences between them.
I don't see calling BME men and white men "men" as being the same thing at all as calling tw and women 'women'.
There's been a longish thread running on FWR over the past few days about the argument 'transwomen are women, just like black women are women' and how incredibly racist that is. Black women on that thread have described how there is a horrible racist stereotype of black women as masculine - not proper women.
www.mumsnet.com/Talk/womens_rights/3556691-a-subset-of-women
If 'transwomen are women, just like black women are women' and transwomen are not women (clearly!) then black women must not be women either. 'Transwomen are women, just like black women are women' is nasty racist BS.
Your example is no better.
For huge shameful chunks of recent history, black men haven't been 'men', have they? They've been 'boy'.
When Thomas Jefferson said, We hold these Truths to be self-evident, that all Men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, and the Pursuit of Happiness ... he didn't mean the black ones, did he? He meant 'Men'.
Do you think transmen are men just like black men are men?