Using the theme that Academia (you can also substitute established Religion, Science, The Powers That Be, Stone Masons, etc.) is resisting his work/message for unknown reasons (aka vast conspiracy) is the common denominator for every crack pot that ever discovered how lucrative it was to claim something unusual was true, despite having no evidence to support his unusual claim.
Does he claim the Knights Templar traveled to Arizona in a UFO lent to them by aliens?
Easy. There were numerous Native Tribes populating America long before Columbus. I know you didn't mean it this way, but it was too tempting to resist
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