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You are fundamentally correct, a person doesn't hold a belief or opinion for no reason. I was specifically (attempting to) refer to "seemingly illogical" conservatism, where there is established fact or science that the 'conservative opinion / action' appears to be working against (climate change, trickle-down economics, backdooring encryption, wind farms).

Specifically where the 'conservative' position doesn't just not quite line up with, but is diametrically opposed to the commonly accepted experts opinion.