Of course crime of passion IS common worldwide irrespective of criminal's colour and religion, but these crimes are not crimes of passion. In most cases of honour killings, the victim's family members (father or brothers) are involved. There are some incidents of cousins killing their cousins out of jealousy OR settle family/inheritance disputes and then giving it honour killing colour. Which again is all about wealth and has nothing to do with religion or Islam.
OK.
1-Agreed that what people call these days 'honor killing' has nothing to do with Islam.
2- Also, crime of passion or out of honor does have a lot to do with what we hear about honor killing. This is what I mentioned to be worldwide. If this involves one person or family member as accomplice, the idea in nut-shell is same. In countries where families mind their own business, cousins and other family members would be difficult to be found to be accomplice merely to commit a crime of passion.
3-When you mentioned about 80% number, and mentioned muslims from three countries, that is where the problem lied. Thanks for clarifying though.