Previously on The Walking Dead:
When Father Gabriel Stokes first appears in The Walking Dead #61 in comics or in episode 5-2 "Strangers" on television, the priest carries a heavy burden. He has a secret. Soon he reveals that he had been too cowardly to unlock his church and let members of his congregation inside when their lives were in danger and, as a result, they all died, killed by walkers. His guilt keeps growing. He tells Alexandria's leader, "Rick, his group, they're not good people. They've done things. They've done unspeakable things.... They can't be trusted. They're dangerous. You may believe that they did what they had to do, that they were afraid and so they-- The day will come when they'll put their own lives before yours and everyone else's and they will destroy everything you have here, everything you're working so hard to build."
From The Walking Dead Psychology: Psych of the Living Dead chapter 15, "Eros, Thanatos, and an Armory of Defense Mechanisms: Sigmund Freud in the Land of the Dead," p. 201:
Gabriel soon attempts suicide by walker, standing ready to let one of the zombies bite and kill him, but he finds he cannot go through with it. He provokes another character, Sasha, into nearly killing him until Maggie intervenes and all three pray together. Having gone so far, he now faces the unpleasant truths. In episode 6-2, "JSS," he all but uses the word projection when acknowledging this to Carl Grimes.
Gabriel: You heard what I told Deanna about your group.
Carl: What do you want?
Gabriel: It was about me, not you. Or your group. I know that now.
He still has a long way to go, but he's trying to face his hard truths instead of clouding them with defense mechanisms.
It was an interesting admission for an episode that ended with several characters in guilt-ridden states. Aaron, Carol, Morgan, Denise.... The guilt goes around.