Why are white supremacists overwhelmingly poor and uneducated?

I'm not the guy you replied and I haven't read that article, but IQ is correlated with neuroplasticity, which is a property of your brain that is tied to your genetics.

You can avoid lead all you want, but it's not gonna increase your neuroplasticity.

No, the people who openly express white supremacist views are often of lower social status.
You are confusing open expression of beliefs with holding beliefs.

I believe IQ is around 50% genetic. Obviously there's gonna be a component.