I actually watched wings a long time ago - it was a good film IMO. Kinda "the Right Stuff" set in an alternate universe.
As far as the whole rape thing goes - I got the feeling from it that the author was trying to show the flaws implicit in all people - that even the hero of the story, after going through this huge transformation from a lazy slacker to somebody who actually gives a damn about something, still has the monster inside of him that we all do - that he can still fall from grace.
The woman's apology might be a more cultural thing - but I took it to show that she was weak as well - trapped within the ideology of her faith, and unable to look to the new horizons that were being opened by the events unfolding around her, just as nobody else did.