I've worked with a pastor/church leader who was also a developer who was the kindest, nicest person ever. Their code wasn't amazing but he was a great leader and could sense trouble and help people out (religious help or just every day advice).

I've known non-religious people who are utter assholes and I would pay to never work with again. As long as someone isn't trying to convert me in the middle of the work day I couldn't care less who or what they worship.

On the flip side, this sounds like the people who complain when popular tech people talk politics on their twitter. Unfortunately, politics and religion have been around a lot longer than programming/tech and both of those things affect lives greatly.