It's hard to write about racism—about the problems faced by blacks and other minorities—without a certain kind of response from a certain kind of writer: White people are poor too. Why don't you write about them.
James Baldwin had this problem too, and his response—I think—is perfect:
People are continually pointing out to me the wretchedness of white people in order to console me for the wretchedness of blacks. But an itemized account of the American failure does not console me and it should not console anyone else. That hundreds of thousands of white people are living, in effect, no better than the “niggers” is not a fact to be regarded with complacency. The social and moral bankruptcy suggested by this fact is of the bitterest, most terrifying kind.