Why are theists so reluctant to examine their beliefs? Do you care whether your beliefs are true?

It just strikes me as very odd that people can be so absolutely convinced of something that is absolutely the most crucial belief in their lives, yet be afraid to actually examine/question it. Wouldn't you want to know whether your beliefs make sense, whether they fit with reality, whether they are logical?
I don't want to question my beliefs
I do question my beliefs
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Why are theists so reluctant to examine their beliefs? Do you care whether your beliefs are true?
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