Screw PC. Abraham Lincoln made a disastrous mistake. He thought he was being humane. Not all cultures are equal and many are incapable within their own people. Liberalism socially re-engineers so called minorities and cultures to the point of where our country stands at this point along with the rest of western civilization.
Moral relativism makes any belief system no matter how sociopathic or bizarre as valid as any other; it then goes a step further whether via mob rule tyranny or a legally mandated tyranny of the minority to eradicate the systems considered obsolete, racist, apostate, etc