Racism, homophobia, and the like are not a matter that can be solved politically. One can make all the affirmative action and equal rights rules you like but the issue at the root is society and culture based. Educational standards are being fought against in our most conservative states pushing for religious indoctrination and denying historical reality.
You have a wing that actively pushes the militarization of the police over community support and engagement, and those same people trying to turn society back to the 'traditional norms' as they existed before the civil rights movement.
Given the realities of the need to actually get votes through, just how would you suggest those things be fixed?