"Honour killings", say what?

I've been following so-called honour killings - mainly in Muslim communities - for some time. What's it about? Here's what the BBC says:

• Honour killings explained
• And UK muslims condemn honour killings
  

Yet they go on and on and on....

A few examples:

• Palistinians
• Jordan
• Pakistan
• Asia
• Europe

Now comes this from the West Bank in Palestine:

• Romeo and Juliet: a Palestinian tragedy

My take on such killings? Societies everywhere need to bring the perpetrators of such murders to justice.

Surely, it cannot be the culture in these countries. With apologies to Churchill, "Some practice! Some culture!" If killing under any circumstances is a crime to be condemned, why do these killings continue? I don't get it.