The last paragraph from the linked article:
"Taken as a whole, research suggests that even thoughtful individuals with good intentions – including Ritchie – are prone to embrace claims for which there is little evidence, and to defend those claims in the face of contradictory evidence. This is particularly likely when stakes are high, when outcomes are hard to explain or accept, or when a claim is consistent with one’s political values. The evidence suggests that Richtie’s speculations are wrong, but there is nothing surprising about his suspicions."