narrowpath,
I definitely don't want to sound trite, so please take this as a good starting place.
I would examine Matthew 18. Obey the commands given therein. You may be a leader in the church, but that doesn't exempt you from these commands. I would go that direction first.
Secondly, I would also examine Titus chapter 1. There is a certain fire that you will need when dealing with people stirring up trouble. Titus 1 lays a good foundation for a framework of thinking regarding those who are causing serious issues.
Thirdly, I am going to tell this saying to you that has completely changed the way I think regarding these types of things:
Often times our judgment of matters is a double standard--we judge ourselves by our motives, but we judge others by there actions.
Lastly, remember what Peter said in 1 Peter 4:8 (who was actually quoting a portion of a proverb): "Above all, keep loving one another earnestly, since love covers a multitude of sins"