Underseer
Contributor
What I've noticed about most Christians, and it's probably true about believers generally, is that they see people of other faiths that don't even worship or recognize their god as real as fellow believers. That always seemed odd to me. It's beginning to make more sense, however, as I've heard the sentiment expressed frequently that everyone worships the same god, the same lord. If that's true then the only thing separating these people is a common religion.Many Christians hold that not all Gods are worthy of worship. Indeed not all Gods matter. For example The Process God concept.
I think a lot of believers confuse worship with god. They share a need to worship and so invent their gods. So when it comes time to discussing religion and atheism, they can claim how so many more people are believers than not, even if the majority of those believers are atheist with regards to their god.
It's mostly Baha'i, very moderate theists, and the occasional "I believe in god, but not organized religion" types among the nones who believe that.
Everyone else believes that practitioners of other religions are going to be punished in the next life. Hell, many of them believe this about people in the same religion but of different denominations.