Are Black trans women known for this kind of behaviour?
The question suggests that Black trans women are all alike. It’s exactly that kind of generalization that’s being criticized.
Nobody is saying all white men are like this, what they are saying that it is only white men who do this.
Being a white man who is aware of the stereotype, I in no way feel attacked by it. I do feel aware that I need to be careful not to interrupt my colleagues or to mansplain things that I may be less knowledgeable about. This response from me is beneficial to both myself and the people I interact with.
“Only white men do X” is absolutely racist and sexist. “Mansplain” is derogatory.
“Mansplain” is derogatory.
I agree that it is derogatory to mansplain to someone, like to tell an expert in a subject that they don’t know what they’re talking about and thinking that’s okay because they are a woman.