You’re making it either / or and it’s not. I can feel sympathetic to the Uyghurs, fight for their rights, canvass my representatives, donate to charities etc.
But I (a black African man) can never truly know or experience what the average Uyghur goes though day to day, because I just haven’t lived it.
So no, when we say that, we are not “excluding” anyone - in fact the more allies a minority has, the more likely they will achieve equality. But lived experience is different.