Yes, there are those who commit atrocities and claim the name of Jesus, but they are no more Christian than stone is food. That is not to say that all who truly follow Christ do no wrong all have but if a heart, or church or society, is known for wickedness, then by no means should they be considered Christian. Even people that have never heard of Jesus have the uncanny ability to detect a bad person, regardless of name. Jesus Christ warned us there would be many falsely using His name. There are more fakes than real Christians. To know a real Christian, without reading the Bible, do not look around at the evil fingers pointing down at you, but rather look beneath you first for the few good hands that would serve you.