The better educated you are, the more left leaning you tend to be:
https://www.pewresearch.org/politics/2016/04/26/a-wider-ideological-gap-between-more-and-less-educated-adults/

Conservatives tend to be dismissive of science and empirical evidence:
https://www.sciencedaily.com/releases/2016/07/160713172717.htm

Higher verbal IQ correlates with liberal attitudes:
https://www.psypost.org/verbal-iq-predicts-political-participation-and-liberal-attitudes-twice-as-strongly-as-performance-iq/

Whatever this dumb shit is, is a reaction to that. As usual, they project their own shortcomings on their enemies.

In any case, what it comes down to is basic empathy and morality. If you care for others, you tend to vote left. If you care for only yourself and your self-interests, you vote right. There is no debating that, it's stated right there in the fucking ideology.