That may (or may not) be true when Moslems interact with each other, but isn't also true that the "rules" do not apply to interaction with "non-belivers"? In other words they can justify any action against non-belivers simply because they are non-belivers.
Yeah, what was that article not too long ago?
British students went on a field trip to a mosque and the Imam told them they were no better than dogs.
Everyone should read The Politically Incorrect Guide to Islam.