Why is the Murder of One's Child to Maintain the Purity of a Family Called an "Honour Killing"? Surely Any Kind of Murder Is Dishonourable!

I just listened to a documentary which I couldn't help but find heart-breaking. And since AudioBoom is now such a huge part of my life, I decided to come on here and air my views on the subject. Beware, o unfortunate listener. ☺ #appalled #HonourKillings #news #thoughts #upset