From a Christian perspective Black holes can not be the hell as described in the bible because anything or anyone unfortunate enough to pass the event horizon is toast. Regardless of they're state of grace. So in other words even the Pope himself could end up in hell by your logic. Black holes are what remains of massive stars that have died. So I thought about it and think your black hole hell theory is full of holes.
"One is punished most for ones virtues" Fredrick Neitzche