A high school Christian friend is the son of an American Lutheran Church (ALC, denomination) pastor who went to seminary and became a pastor in the ALC. In 1987 (IIRC) the ALC merged with the liberal Lutheran Church in America and formed the Evangelical Lutheran Church in America (ELCA). The church my friend pastored decided as a congregation to leave ELCA. It's easy to tell things that happened, but my friend and his father had given decades of their life serving in the ALC, decades of love and loyalty. Members of their congregations had invested similar love and loyalty. No one's world or faith ended, but the betrayal by the denominational hurt a lot of people.