Started a new game on Conqueror. Everything worked great for me as far as pre-built settlements goes (I killed Jammer. Didn't wanna be a raider...) and it was great up until I had Preston Garvey as my follower and did the Arc Jet mission for Paladin Danse. Long story short, Preston was downed (but not killed) by a synth and I was immediately awarded the "Executioner" perk. Having turned off Executioner's ability to murder essential NPCs I thought nothing of it until I returned to Sanctuary to find Mama Murphy, Jun and Marcy, and even Codsworth and Sturges trying to kill me. The awarding of Executioner seems to act like it assigns you to an enemy faction as soon as it's awarded to you, but this enemy faction seems to literally just be comprised of your original Sanctuary crew. Just figured you guys should know. I have no idea how to circumvent this at all.