It is dangerous to write off such barbarism as merely being a flaw of Islam, writes Waleed Aly. You are familiar with the horror stories. A woman is suspected of a premarital relationship or refuses an arranged marriage, and is blamed for bringing shame and dishonour to her family. Her relatives rule that family honour can be restored only with her blood, and assault or kill her. Sometimes she is beheaded, burned to death, or driven to suicide. Sometimes she is maimed, disfigured by acid, beaten or raped. Sometimes she is as young as seven. Called honour killings, there is...