To get an idea of the 'evil' implicit on Moral Relativism one can read the following:
Also, one should read the following:
Objections to Moral Relativism
Relativists Exaggerate Cultural Diversity
Relativism Ignores Diversity Within a Culture Relativism Implies that Obvious Moral Wrongs are Acceptable
Relativism Undermines the Possibility of a Society Being Self-Critical
Relativism is Pragmatically Self-Refuting
Relativism Rests on an Incoherent Notion of Truth
The Relativist Position on Tolerance is Problematic
1) Once again VA opts to not think for himself.
2) If he actually read his source, he would notice that for every argument, the source presents two or more sides. If VA thought for himself, he would notice this, because he would have written it. But as he has with Kant and all VA's sources, including Wikipedia and Online free AIs, he doesn't read what he quotes from. He skims at best or simply finds quote he likes because his posting is ressentiment embodied. PH and others did not accept his reasoning, so anything he can find that makes them seem evil, stupid, condoning evil, more violent and so, he will quote, without checking the context, even reading his own quoting from sources.
We do know the history of the Moral Objectivisms. They have justified wars of domination, rape (including systematic rape), the killing of people with different moral realisms or for not being moral realists, the killing of classes and subgroups of people, colonialism, slavery and so on. We know that moral objectivisms have been regularly used to justify violence and suppress any potential empathy for the victims.
[remember the irony that moral subjectivists think that morals are mind dependent.]
We don't really know what happens when most people are moral antirealists, since this has been less common, or at least very few dared to say it, through much of history. Also we can't unify people by calling them moral antirealists, since they may have very different values from each other, just as moral realists can. But conclusions about what things would be like if a majority were moral antirealists is radical speculation. On the other hand we do know what it's like with moral realists.
Here in this forum we have one moral realist, who like many moral realist propagandists paints his philosophical opponents as evil, primitive, violence prone and stupid.
Anyone with even a shallow knowledge of the 20th century should shudder when hearing a moral realist repeatedly framing a group of people in this way.