Well, this explains some of the boys here...

https://tinyurl.com/yc7ub7zv

Excerpt:

There's no gentle way to put it: People who give in to racism and
prejudice may simply be dumb, according to a new study that is bound to
stir public controversy.

The research finds that children with low intelligence are more likely
to hold prejudiced attitudes as adults. These findings point to a
vicious cycle, according to lead researcher Gordon Hodson, a
psychologist at Brock University in Ontario. Low-intelligence adults
tend to gravitate toward socially conservative ideologies, the study
found. Those ideologies, in turn, stress hierarchy and resistance to
change, attitudes that can contribute to prejudice, Hodson wrote in an
email to LiveScience.

"Prejudice is extremely complex and multifaceted, making it critical
that any factors contributing to bias are uncovered and understood," he
said.

Controversy ahead

The findings combine three hot-button topics.

"They've pulled off the trifecta of controversial topics," said Brian
Nosek, a social and cognitive psychologist at the University of Virginia
who was not involved in the study. "When one selects intelligence,
political ideology and racism and looks at any of the relationships
between those three variables, it's bound to upset somebody."

Polling data and social and political science research do show that
prejudice is more common in those who hold right-wing ideals that those
of other political persuasions, Nosek told LiveScience. [7 Thoughts That
Are Bad For You]

"The unique contribution here is trying to make some progress on the
most challenging aspect of this," Nosek said, referring to the new
study. "It's not that a relationship like that exists, but why it exists."
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* Lock up Trump and his family of grifters. *