AN OVERWHELMING MAJORITY OF SCIENTIFIC STUDIES PROVE DEFINITIVELY THAT RIGHT WING BELIEFS ARE HEAVILY CORRELATED WITH LOW INTELLIGENCE:
Bright Minds and Dark Attitudes: Lower Cognitive Ability Predicts Greater Prejudice Through Right-Wing Ideology and Low Intergroup Contact

Low IQ & Conservative Beliefs Linked to Prejudice

The association of cognitive ability with right-wing ideological attitudes and prejudice: A meta-analytic review.

Predicting political beliefs with polygenic scores for cognitive performance and educational attainment

Study links low intelligence with right-wing beliefs

Right-wing ideology and numeracy: A perception of greater ability, but poorer performance

Conservatism and cognitive ability

Intelligent people are more likely to be left-wing, says science

People with lower emotional intelligence are more likely to hold right-wing views, study finds

(Taken from pinned comment here)