Honor Murder?

Where did this nonsense of honor killings come from? Is it rooted in Asian cultures or Islam. And if in Islam, where is it grounded in the Quran? And if it's really supported by the Quran, doesn't it make Islam a dangerous religion for Western nations to allow? Of course, those questions will be objected to by CAIR as a violation of Muslims' First Amendment rights, but CAIR would be full of crap, again.