Anything, please, with one of Bucky's rapists arguing, directly to Steve and Bucky's face, that it wasn't rape, maybe that Bucky couldn't be raped, certainly that he was too tempting to resist, which makes it his own fault. The more the rapist truly does not think of himself as having done anything wrong, the better. Perhaps he doesn't even understand at first what they're accusing him of, then when he gets it, he just laughs; that's how ridiculous it is to him that they'd even care what he did to this non-person. Dehumanization, blaming, shaming.

+ if this rapist doesn't address Bucky, preferring instead to talk to Steve. Not as some kind of malicious rejection, just casual dehumanization, in the same way that adults in conversation will talk over the head of a child or a dog.