Beliefs can become social possessions that people defend for reasons beyond their content.

An opinion held long enough stops being only an opinion. It becomes a membership card, a reason certain people call you, a thing your family expects you to say at dinner, and abandoning it would cost more than being wrong does. That is why arguments about evidence so often go nowhere: the evidence was never what was holding the position up. Recognising this in yourself is uncomfortable and considerably more useful than recognising it in others.

Pick a view of yours and ask what changing it would cost socially. If the answer is anything at all, examine the belief with that in mind.