Most humans mold their religious views around a multifactorial worldview. While circumstance of birth usually decides what general theology a person will follow, the specific subset of beliefs within a given religious framework that they espouse are shaped by a multitude of factors many/most of which are not inherently linked to their religion. Political beliefs are often shoehorned into their religious belief because they already believed them for other reasons.
So when people ask "why would a person who believes in X religion vote for Y" or "why wouldnt a relifious person vote", it really just represents a fundamental misunderstanding between the connection between religious and political beliefs for most people. Very, very few people operate within the "I believe in X religion, therefore I must endorse Y politically no matter what" framework. Many people THINK they do, but they really dont.
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