I'm thinking of designing a theme park to recreate a concentration camp.
That sounds really dark. So you want a museum or a historical reineactment.
I would dig a large hole in the ground and then fill it with Jews
That's not how the death camps worked. That would just be insensitive. Perhaps making historically accurate camps and teaching people about history would be better?
What do you care?
I just thing the word amusement and holocaust don't go together. You should make it respectful at least.