A Pillar of the Community

A Pillar of the Community is an unmarked quest in Fallout 4.

Detailed walkthrough
The leader of this cult, Brother Thomas, will try to convince the Sole Survivor to join their group. He will make grand statements about improving the lives of everyone in the Commonwealth. If the player agrees to join the group, Thomas will take the player character into the back room of the amphitheater and ask him to forfeit all of his worldly possessions in favor of the Pillars of the Community.

If the player questions this, Thomas will reveal his true intentions as a con-man, and threaten the player's life. It is possible to pass a speech check that allows the player to leave with all of their possessions, without causing a fight. If the player refuses Thomas's proposition, he and all of his followers will immediately become hostile and attack.

If the player character does kill Brother Thomas and his followers, Thomas will respawn during the quest Emogene Takes a Lover. There is a speech check that allows the player to intimidate him, saying that they "killed the last guy running this scam".