It should go without saying, but people who promote abortion or homosexuality are not Christian.
What about people who jettison the entire book of Matthew? What about people who say that since man can never be as perfect as the Father, then man shouldn't bother to follow any of the commands of Jesus? What about people who attempt their own interpretation of Scripture and come up with their own doctrines and beliefs? What about those who reject the Church Fathers and the canon of Scripture declared by the Church?