Dunning Kruger in religion

There are two halves of the Dunning Kruger effect.
The stupid people who think they're much smarter than they are, and the intelligent people who also think stupid people are smarter than they are.

(Yes, I'm actually calling stupid people stupid. Call 911 if that upsets you.)

I see a lot of intelligent people who overestimate the intelligence and reasoning abilities of stupid people.
In fact, some of these intelligent atheists tell me I underestimate people that believe the world is 6000 years old.
I don't think I do. Nor do I overestimate them. If someone believes that Noah's Ark was real and the flood happened and the world was covered in water, then they're stupid.
They can be born stupid or willingly stupid, but they are stupid.
I get chided for not treating stupid people as intelligent people... for not treating their opinions as respectable opinions.
Whether they are born stupid or are wilfully stupid is irrelevent if they are trying to force religion into schools or government.
Look, if an opinion is based on disbelief of scientific evidence and blind belief in a holy book, I don't respect that opinion.
I may or may not respect the person who has such an opinion, but opinions deserve no respect or praise.

Education is the cure for either half of the Dunning Kruger effect.

I think it is easier for those in the upper middle area of intelligence to gauge their own and other's intelligence.
(I count myself in this middle area.) They seem to be smart enough to know who they are and observe those around them, but not so smart as to be surrounded by only smart people and think everyone is intelligent.
One must have experience with the intelligent and the stupid to have a reasonable grasp of their capabilities.

I wonder how much the Dunning Kruger effect is affected by educational status, and by the people with whom we associate?