Read it in as a royal "you" all.
But what part of it being a social construct is hard to understand? The Nazis clearly killed people of the same race. White doesn't exist. Jew doesn't exist. Black doesn't exist. Well, they exist but not in any particular form, they're whatever we're hallucinating up at the moment. The Holocaust wasn't about race. It was about what could be taken. The same institutions did an even bigger number(impressive, I know, good lord) on their eastern front simultaneously. They had a lot of vanity projects going on about who they could kill and what they could take. Rapists and murderers always have justifications, and the justifications literally are entirely beside the point. Evil is like that.
Well I couldn't help but take it personally, because I was offended you called me a capitalist,
because it's true.
I agree up through what you are saying at "they're whatever we're hallucinating up at the moment". From there I diverge. Yes, the starting psychology of the Fuhrer is his obsession with cleanliness embedded into his desire to hurt, to take away good. Also everything that motivated him. But he did it in part, in great part, in founding principles great part, through a racism. And spreading those memes inspired others to act, to build further justifications to act, upon that structure.
Rapists and murderers
and racists always have justifications. Do you see? What makes a murderer evil? Or rather, why isn't murder besides the point, why isn't abstract evil the point?
Obviously because abstract evil is a description of actual powerful harms, the physical hurt and the psychic extra hurt, and the ruination of beauty, and so on. We can name it evil to spur action, and call it racism to spur inaction. Or, we name it racism to spur action, and name it evil, to spur inaction. These depend on the recipient. In our society, we are fortunately returning to calling evil, evil. But calling racism racism moves us to action, and gives the tool of evil a target we can oppose.
If the wicked swings his sword, obviously his sword is a problem, and if we sword fight, we can defeat the wicked. If we say "the sword doesn't matter, only that he is wicked" and he swings his sword, we're too late, unless we can sword fight and are equipped. But why would we know to need to sword fight, and why did we equip ourselves? Because we had better known to, and that came from putting our attention on the granular, downstream issue of sword wielding, as we have already failed to stop the wickedness in advance.