People whith low intelligence won't come here

Theosophist Yrjö Kallinen
 said some of the same.

Many has  wondering, why might less intelligent people be drawn to conservative ideologies?

Reality is complicated and messy. Ideologies get rid of the messiness and impose a simpler solution. So, it may not be surprising that people with less cognitive capacity will be attracted to simplifying ideologies.

Because such ideologies feature structure and order that make it easier to comprehend a complicated world.  Unfortunately, many of these features can also contribute to prejudice, claims a new study from Brock University in Ontario.
According to dr. Gordon Hodson, a professor of psychology at the university and the study’s lead author, said the finding represented evidence of a vicious cycle:

People of low intelligence gravitate toward socially conservative ideologies, which stress resistance to change and, in turn, prejudice.

The study, published in Psychological Science, showed that people who score low on I.Q. tests in childhood are more likely to develop prejudiced beliefs and socially conservative politics in adulthood.