Just because people die for something or some cause doesn’t mean they were right. Passion and zeal are wonderful, but they need to be laced with pragmatism and intelligence. Logic makes us think, emotion makes us act. It’s usually not a good idea to exclude either.
Never assume the other person is damaged just because they don’t agree with you, and don’t assume they’re inferior because they don’t subscribe to your particular standards. There’s a name for that practice: arrogance.