The ‘wrong religion’ entrance is a slide leading to Hell. At least according to the Taliban, the Christian Taliban, the Ultra-Orthodox Jews…Pretty much all the fundamentalists. Be they Muslim, Christian, Jewish, or anything else.
Sure, they have different holidays, have different food rules, and other things like that, but they all share one belief: Theirs is the Only One True Faith, you must believe the way they want you to believe, and they will force you if they have to. If not, You will go to Hell.