The logic goes like this:

Pam: Guy was a Muslim, and murdered his wife and children.

Pam: This must have been an honor killing.

Charles: It does’t look like an honor killing. It looks like a plain old homicide.

Pam: WHY ARE YOU DEFENDING THIS MAN? HE’S BAD!

Pam: Also, he’s a Muslim. So this must have been an honor killing.