Of course the Afghan is correct. It would have been career suicide for Laura to go into that particular angle, but it would have been the right one to go down. He is right. It is their culture. But only of infidels. If he had done that to a Muslim girl, it would have gone badly for him. It should not escape notice that he was an employee of the US in the longest war in Afghanistan.
Sexually enslaving young boys though, that seems to be OK.
This seems like a good place to repost this stunning VICE report on how it is for little boys over there.