Well, let me ask you. Do people tend to believe things because they've thouroughly researched all sides of the issue and developed an intimate familiarity with the evidence before making their decision, or do they usually pick the more desired outcome right at the get-go - the one that makes them feel the best or best integrates with what they already believe about the world - and then come up with reasons to justify it after the fact?
Neurology tends to support the latter, not so much the former. So you tell me. Given that we now know how most humans are making decisions about what positions to hold, can we assume that the position held by the most humans is probably the correct one?