It is true that this is a Muslim society. However, it is hard to attribute this entirely to religion. The opprobrium is virtually the same in Africa, in the Democratic Republic of Congo. I have not heard of any fathers who killed their daughters in Congo because they had been raped, but the shame is the same. Husbands leave their wives if they have been raped. I have heard less about honour crimes, but the opprobrium and shame are virtually universal. Consequently, it is hard to attribute them entirely to religion. Let us say it is a very patriarchal culture.
That is a good question. I asked it too because I was horrified by what I had heard about honour crimes. I previously investigated this matter in Pakistan, which is also a Muslim society. This is not normally a dictate of that religion and nowhere is it commanded that it should be done. These societies are conservative and extremely traditional. That is obviously a very poor reading of the religion. People do not do it in the name of Allah or in the name of God, but it is a fact that this is essentially the practice in Muslim societies.
Those who report these crimes and who helped me conduct this investigation are enlightened Muslims. Those who combat these crimes are also Muslim and they do not understand them. Whatever the case may be, it is true that this happens in traditional Muslim societies, even though the religion has never called for it.