One guy I sat next to for about 5 years. He had an undergraduate degree in biology and a graduate degree in computer science. He was a conservative Christian. He didn't believe in evolution and we used to talk about that a lot. I once called him a fundamentalist, not meaning it as an insult, but thinking it because he didn't accept evolution. He was insulted by that label. He was not a biblical literalist. He had a philosophical approach to life , so we talked about lots of things: the meaning of life, the origin of the universe, science, philosophy, etc. He voted for Obama in 2008; I think mostly because of the Iraq War, and the incoherence of Sarah Palin. He died in his mid 40's in 2011. I went to his funeral in a huge church. The service mostly talked about love and the faith Mike showed while he was in the hospital and knew he was dying.
For a number of years I worked as a consultant. The group I was in traveled all the time. My boss was an ex-Marine Corps officer; and his dream was to be a youth pastor in a Christian Church. He knew I was an atheist and we used to talk about life, faith, and the meaning of it all. Since we were usually "on the road" a number of these talks took place into the wee hours in various bars. The one conclusion I came to from these talks was that when we really got down to what each of us believed, neither one of us had a firm grasp on ultimate meaning. I used the word universe, he used the word God; but neither of us could define what we actually meant.
Most of the places that I worked, it seemed to be divided roughly 50 - 50 between atheists and fundamentalists. I spoke with different people on either side of the question. We never argued or attacked anyone's beliefs; really just tried to understand. Of course, I only had these types of discussions with a few people. But, I never had any problems, or witnessed any problems between people because of their different beliefs.