In Green Room, the young people are stuck in the room with a man who's got a gun. Darcy Banker (played by Patrick Stewart) shows up and is ready to kill them, presumably using knives so they can make it look like the dogs got them.
The obvious approach then is to tell the man with the gun to open the door, come out, and then the guys with the knives can enter and let loose.
However, Darcy tells him to give the gun to the young people. They then take the gun and do exactly what you would expect them to do: refuse to leave the room, holding the man at gun point. Suddenly things are much more complicated for Patrick Stewart and his crew.
Why - in the world - did he tell the man to give his gun away?
Is there a possible in-universe explanation for this?