According to religious doctrine anyone can be saved, if they accept the religion and properly observe its requirements. All 3 Abrahamic religions are like this: we alone hold the keys to the kingdom of heaven so swear allegiance, follow our rituals, observe our proscriptions and you too can join the grand cosmic carnival in the sky after you're dead, and everyone else is fxcked no matter what.
If we pick on Christianity it's because that's the religion that's shoved in our faces. No one has ever tried to push Islam or Judaism on me, but Christianity? Shit, our entire culture is being eaten by a malignant form of Christianity, and has been for decades. It's not all bad, but the bad actors are cancer.