Following Christ is not always easy
Luke 14:26 If any man come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.
Psalm 55:12 For it was not an enemy that reproached me; then I could have borne it: neither was it he that hated me that did magnify himself against me; then I would have hid myself from him:
13 But it was thou, a man mine equal, my guide, and mine acquaintance.
14 We took sweet counsel together, and walked unto the house of God in company.
These stories are not to imply that you should leave your church but rather prepare and comfort those that do leave.