"Nothing to do with Islam but the report said it was within the culture the family had been brought up in."

And on what authority do you make this statement? Do you not know that there is no central authority for the interpretation of the Quran, the Hadiths and the Sahaba? Islam contains many schools of thought and there's no one single or simple source of interpretation on disputed points. Do you know what every Imam is preaching to his congregates on this issue? If the Imam prescribes honour killing to his followers does that still make it "nothing to do with Islam"? In many Muslim communities culture is intertwined with Islam - where do you draw the dividing line? Many progressive Muslims would disagree with your simplistic statement.