This is the very essence of the sectarian spirit. Sectism is sinful. It is a work of the flesh, a symptom of carnality and a sign of spiritual immaturity. It is not hallowed because we practice it , nor purged from evil because we are guilty of it. Not every person in a sect is sectarian.
Sectarianism is the party spirit.
It is an attitude toward truth. A man can be wrong on a doctrinal matter and not be sectarian. We call upon all men to leave their sectarian spirit as they would flee from any other work of the flesh.