OP do you find it offensive because you think a white person identifying as black is more offensive than a man identifying as a woman, because black people are more oppressed by white people than women are by men?
Do you mean that because racism is a worse form of oppression than sexism, it’s therefore racist to say that an act (trans-identity) where the “oppressor” identifies as the “oppressed” is the same, whether it’s happening along sex or racial lines?
If so, I see what you’re saying.
However, are GC using trans-racial identities to point out the unfairness of trans-gender identities necessarily even proposing that sexism is worse than/equal to racism?
I think trans-racial identities might even be used as an example because racism IS worse, and then the logical argument is, “okay you agree that’s ridiculous in the context of race, can you not therefore understand our argument when it’s based on sex/gender?”
Not necessarily to say that they’re just as bad as each other, just to illustrate that both follow the same logical fallacy, but people seem to find it easier to spot the fallacy when it comes to race because it’s much clearer.