Brother, you need to grow the fuck up. Right now, you're coming across as one of those try-hard college students on a 'Rationality Rulez' bender.

Morality is subjective but not in the manner you're describing. It's not arbitrary. Our values are conjured out of thin air but for reasons that DO involve the betterment of humanity.

Slavery isn't subjective, and extermination camps sure as hell are not either.