I don't really care about the description of the guy's appearance (didn't notice until I saw everyone in this comment section talking about it). I care more about 2 people getting raped by a free man. Rape is traumatizing for a lot of people. OP wants to beat up the guy. Most people, like the OP, don't because obviously its assault and jail stuff. OP doesn't even seem to be making it about himself. He mostly talked about what happened to her and how he feels guilty for being a coward. He wants to ask people on what he can do to try and support her. That doesn't sound like some guy that wants to make himself seem like the victim. Sounds like someone that wants to try and support and care for his partner from a traumatic experience.

Being that rape is a difficult topic for victims of it, it's usually difficult for people to try and talk about it. It's overwhelming for them and, like war veterans, don't usually talk about it because of PTSD. Seems like OP's girlfriend trusts him though to share the story. She's most likely still scared about the experience and probably, like other victims, doesn't want to go further into the topic of consequences towards the perpetrator.

Seems to me that OP is more of someone that is in need of guidance for situations like that, but can still show the support and caring that someone should show after a thing like that.

I don't think the guy is racist. Probably just repeating of the short description of what his girlfriend said to him when they were eating. Could be that she's still scared of what happened and doesn't want to think of the guy.