
The underlying cause is they are more emotional driven than the baseline human, I think. We’re all emotional, but I feel like some people really let the truthiness gutfeel of emotions rule the day and facts are just not that important to them.
Pick like any of those and you see they had a choice between feelings that make them feel smart or part of an in-group, or facts that made the world clash with their beliefs. And because they’re kind of fools and cowards, they go with the feel-good most of the time.
I believe French does this as well. To answer in the affirmative to a negative question, you use “si” instead of “oui”
“Si” is also the word for “if”, which has probably confused people.
(top search hit, not sure if good, but on a quick glance it looks correct https://www.commeunefrancaise.com/blog/si-in-french )