This idea of a gullible, pliable populace is, of course, nothing new. Voltaire said, “those who can make you believe absurdities can make you commit atrocities”. But no, says Mercier, Voltaire had it backwards: “It is wanting to commit atrocities that makes you believe absurdities”…
If someone says Obama is a Muslim, their primary reason may be to indicate that they are a member of the group of people who co-ordinate around that statement. When a social belief and a true belief are in conflict, Klintman says, people will opt for the belief that best signals their social identity – even if it means lying to themselves…
Such a “belief” – being largely performative – rarely translates into action. It remains what Mercier calls a reflective belief, with no consequences on one’s behaviour, as opposed to an intuitive belief, which guides decisions and actions.
https://www.the-tls.co.uk/articles/fit-facts-around-prejudices-review/