Anders (the guy on the crucifix) sometimes bugs where the dialog option to cut him down doesn't show up. No known non-PC fix that I know of, so you'd have to try reloading a previous save. If you're on PC you'd need to use a console command.
Thanks. I figured it was a bug. I got bored, rolled back to the camp and killed papa, and everyone else in the house. Just when I goto pull the trigger on regis, he gets up and we have a chat, and he says they will follow ncr.
Now moore still wants me to destroy bos after I helped do all their stuff, and I still haven't reported back to yesman.
I'm really amazed how massive this game is. I paid $9 for it, so the glitches aren't as annoying. Thanks for the info!