Mention of the devil offends people.
They don’t like to hear about him, any more than they want to hear about hell. The devil and hell are not a real entity and a real place we are told. They are the boogeyman and the boogeyplace that we Christians use to scare people into conversion.
Many Christians also dismiss the devil and hell. Back when I was a protestant, I was often corrected by my various pastors about my belief in both a literal hell and a literal devil. “Hell is separation from Christ,” I was told. “It is, simply the grave with no resurrection.”
“The devil is not an actual personality,” I heard another time. “There is no such thing.”
But the truth is, Jesus spoke often and graphically about both hell and the devil. There is no indication in any of His words that hell is a state of mind or that the devil was a figment of religious imagination. On the contrary, Jesus gave us our most clear portrait of both these realities.
Maybe because, as a pastor of souls, he has met the devil many times. I’ve said before that it is a scalding, life-changing thing to look into another person’s eyes and see the devil looking back at you. Perhaps Pope Francis has had this experience. If he has, it would explain a lot.