The phrase is from "Hacksaw Ridge" movie. It's about Desmond Doss who voluntarily enlisted in WWII but refused to carry a weapon because of his religious beliefs. Now the company's commander is talking to the drill sergeant to decide what to do with Doss. The drill sergeant: "Perhaps we could help make believe in his idea."
Sergeant: Perhaps we could help make believe in his idea.
Commander: Yeah, you restrict him to barracks and KP. If he throws God at you, you throw Hell right at him. I want him gone.
I'm not sure what does "help make believe" mean.