A person can use reason about a great many things whilst ignoring it for a special subset of others.
Religion requires a specific *lack* of reasoning. It requires that you hang up all evidence based logical thinking and very literally take everything on faith.
"My book is the perfect word of god."
"We know exactly how god wants you to live your life."
"Our religion is the only true religion."
These are not factually verifiable statements. To believe that any of the above are true demands one ignore all other similar claims.
Unfortunately we have a significant amount of evidence that suggests that the followers of god are not willing to just live and let live, they're not even willing to agree to disagree. They *know* that they're right and that makes any alternative claim subject to correction.