I am doing the GI Blues quest; and want to help NCR by getting Kings to stop attacking them, but I am at a point in the mission where I have to "Aid Pacer" in a gunfight with NCR. I try to approach the NCR with my weapon holstered and they still turn hostile and shoot at me, so my only option is to help Pacer. But doing so lowers my rep with NCR, which I intend to side with.
I also heard you can approach the Major and convince her to end it peacefully, but I can't get close without them shooting at me. Even with an NCR outfit on they turn hostile.
What do I do?!