If you read a textbook-style account of conflicts centering around the Protestant Reformation(s), it'll probably focus on theological disputes: justification by faith, the lay chalice, baptism, the meaning of "hoc est corpus meum," predestination... kind of thing.
But a lot of the most persuasive work – at least IMHO – on religious conflicts in the 16th and 17th cautions against focusing too much on "ideational content."
There are a variety of pitfalls here. One of them is that most of the people fighting over religion probably didn't to that point by carefully weighing the finer points of theological disputes. Dynamics of community, identity, and ritual probably played a more important role.
I've been thinking about this as we approach election day. American politics scholars understand very well that, for most Americans, partisanship drives ideology. Scholars of ethnic politics see familiar patterns in U.S. political polarization (cc @sstroschein2).
Political movements embrace conversion (!!) narratives as validations of their beliefs, and the converted stress ideas and epiphanies. But it doesn't take much poking around to see the crucial role if identity, belonging, and social affirmation.