Then allow me to explain the cartoon. A devil is depicted taunting a stupid atheist. Why presume he's an atheist? Because his soul is described as worthless. Why stupid? Because after wishing aloud to be the greatest ever he sells his soul for only a box of crackers.
So "what that has to with Christians supposedly fearing?" It's a projection. Naturally both Christians and atheists would prefer everyone to be more like them. Many Christians do indeed fear devils so project that upon atheists. Initially, to circle their wagons by painting them as their enemy, and secondarily to try and convince atheists to fear devils too, thereby converting them to Christianity.
My bad. I didn't think of it that way at all. The guitarist could be anyone. If anything, I hoped it would lead to seriously discussing Satan since I learned that Satan isn't some entity that can be easily dismissed.
A child who cannot let go of their adolescent fears and superstitions is said to have never grown up.
Satan is easily dismissed. It’s called adulthood.
The Easter Bunny is what you should fear.