Are there people who believe their religion is true?

Are they open minded intellectuals or stupid people? Do they completely accept a major religion?

If there is an open minded intellectual, were can I find him?

Did you ever debate about religion? Don’t all religions have serious challenges? I often see such debates having the same questions over and over again. The debate usually changes from religion to “You are stupid” “You are closed minded” “you are anti-G-d” “You are going to hell”. If the person is opened minded why are they afraid of challenging questions? Either they know the answers and can assist others in finding the truth, or they can learn more and advance their understanding.

Isn’t the first step of soul searching to be opened to learn? I don’t think someone needs to read every religious book, but they should at least understand the basic principles, unless they are absolutely sure that they found the true religion. If they are sure they are part of the true religion would they fear challenges?