I mean, how are they supposed to.know not to rape people?
If you've never hear a young girl describe how growing up in her inner city environment meant that at some point as a pre-teen/early teen she expected someone to just come up to her and "take it". And often it was going to be a relative. And while she didn't like it, it wasn't something to be reported as a crime, but rather "just the way it is".
So that doesn't justify anything, however, it's a perspective that I've never forgotten. And if that environment shapes the perspective of the victim to the extent that she is just fearful until it happens and then just expects men to treat her that way going forward, I can imagine that it somewhat changes the view of the males growing up in that environment.
I have no idea about the young men's background, but normal, moral expectations about when sex is OK is absolutely lost on many of the youth today. It' s hard to fight those kinds of battles in a morally relativistic society and getting harder by the day...
As a similar mindset kind of thing; while not on the level of raping a human, I suspect that Michael Vick just grew up fighting dogs and didn't really give it a ton of consideration and was probably genuinely blindsided when he was vilified in that way.