I've read other views suggesting it's societies fault that men don't realise this kind of scenario is rape and that those men aren't necessarily bad people.
Nonsense. Sure, men might not realise that it is considered rape by law (i.e. that other men would disapprove of them) but they sure as hell know that they harm their victim massively.
I do not have a high opinion of people who have no empathy or morals and think they are entitled to harming others as long as the law allows it.
Admittedly, I do not have the stomach to read this article right now, but I am quite sure this was not the kind of nonconsensual sex where a woman offers to have sex she doesn't want because she thinks it is expected. As if it was that, no one would think the man needs to be forgiven, even.
So, must be circumstances where he knew he was harming her. And that's that.
Iceland is, for all I know, a relatively progressive country. Which means that yes, the man knew very well indeed what he was doing, and the justice system is quite likely focused on forgiveness.