Excuse me, but Jesus instructed his disciples to discern between them that are truly sheep and them that are ravening wolves hidden in sheep's clothing. How can an acclaimed Christian distinguish between the two without being bias or act as a bigot? Answer: Read the Bible, and see whether what they do lines up with what is said. Metaphorically, we are to discern between those that are true and those that are untrue Christians. Judging between the two is not a matter of personal preference or one's own opinion, but only off of the fact that if what they do (their fruit) doesn't line up with scripture (the tree). If what is stated about an individual is true and evidential, the conclusion is justified.