Institutional Leftism is due the inherent need for self-superiority of unremarkable people (Dunning-Krueger), the availability of group resources and the acquiescence of societies.
Agree strongly, It’s multi-faceted to be sure.
In another video Dutton makes the point subversive plans like Communism infiltration of our foundations (education-media-government) is better resisted by a population when it is principally made up of healthy group oriented individuals.
Which is why such ideas as trans choice, gender choice , CRT etc were laughed at in the 1800s-early 1900s. But now there are more people made of weaker “stuff” that such ideas are considered. Also we are less religious, we are subjected to propaganda etc. of course are important factors.
But just look at some of the images of ANTIFA arrested in George Floyd riots. They definitely are flawed, mentally unwell people… “spiteful mutants” as Dutton describes them:
https://www.reddit.com/r/pics/comments/rva0yj/mugshots_of_36_protestors_from_the_george_floyd/