What do you think when you see someone who passionately believes something which is false? Do you think maybe there is some sort of mental illness involved? Or is it because of the effect of social media and it's distortion and erosion of reality? Witness hundreds of thousands of people who believe Israel is a brutal conqueror, an occupier of stolen land. Even more people believe that climate change is an imminent threat that must be addressed now. Both of these beliefs are false, but just look at them with all their passionate intensity. Notice the self-righteous scorn they use whenever their beliefs are challenged.