The 4chan anonymous conversations do not prove anything
speculations are not facts
The Buryat with the fringed hat (Vitaly Aroshanov) wasn’t the castrator. But he was the squad leader of his team members (Buryats, Chechens) that castrated the POW and then shot him and desecrated the rest of his body.
They posted stills from the videos, showing one has a smooth curve to the outer rim of the ear, and the other’s ear has an angle.
It was not a conversation, it was pics from the two videos showing it was two different people. Meaning somebody procures the exact same hat from somewhere, found a guy who looked the same and castrated and killed somebody to produce the video to help Ukraine.