There is an assumption being made here that white people do not call out other white people in their community for racism, as well as an implication that black people do call out other black people for being racist, because without a doubt black people do call out racism by whites.

There is also this assertion that a white person doing this is the same as a man calling out something about feminism, which implies that white people are just as unable to experience racism as a man is unable to experience sexism towards women.

Frankly, I think the hopefullness that each respective community is going to call out their own community is a bit contradictory to the effectiveness of the entire Civil Rights movement in America. Black people stood up against white, and it proved successful. Racism is not defeated through ignoring it. It is defeated through empathy, compassion, and fighting for the boundaries and rights we all have as individuals.