You attract what you are... right? Churches tend to assimilate people who look alike, think alike, vote alike, dress alike, sound/sing alike, earn alike, sin alike, etc., right? So what about the mixture of nationalities and cultures that comprised the early church: Greeks, Jews, Barbarians, Scythians, etc. (see Col. 3:11)? How were they able to unite such cultural diversity in this new organism called the church?
"Heretic" means divider or one who causes schism. We think of modern heresy-hunters as those who sniff out doctrinal error and expose it. But Biblically speaking, heretics are those who bring needless division. They use a magnifying glass to discover blemishes, or points of disagreement, in and with others.