Nazis think that if you kill a Muslim with a pork fat bullet then they don’t go to paradise because Islam considers pigs unclean. As you’d expect from Nazis, it’s based on a gross oversimplification and misunderstanding of Islam, and it’s a trope that’s been around since at least the Iraq War.
But wouldn’t a Christian Nazi believe Muslims didn’t go to heaven, no matter what?
The idea could be that enemy morale is hurt if they think they can’t get into heaven