To help you along:
The Sharia doesn't condone 'honour killings' and in a way, this is a confusing title.
The Sharia does condone the killing of anyone who disrespects Prophet Mohammed or Islam. Sharia law advocates the killing of anyone who oppresses Islam. Guess what? Unfaithful wives, promiscuous daughters....they disrespect The Prophet and Islam....lots of young girls, especially those growing up in western countries even oppress Islam by their behaviour.
BEHEAD THOSE WHO INSULT ISLAM!