It could be that the stupidity is "self-inflicted" by the beliefs in their own ideologies. Anything that contradicts those ideologies is rejected at all costs - they have no choice, since admitting that the contradictions exist would destroy the basis of those ideologies... which have become a large part of who they are as people.
It could be that the stupidity is "self-inflicted" by the beliefs in their own ideologies. Anything that contradicts those ideologies is rejected at all costs - they have no choice, since admitting that the contradictions exist would destroy the basis of those ideologies... which have become a large part of who they are as people.
Confirmation bias