Saying "let's return to a sustainable, medieval lifestyle and nurture Mother Earth"

Please point out where he said that.

You're probably not the best person to say that, considering that your lifestyle these days revolves around medieval technologies like outhouses, making head cheese, haying with horses, and tooling around in horse drawn buggies.
It also involves tractors, automobiles and electricity. We're quite proud of our adaptability.

I also notice that you don't answer the question.

You are a true crank.

No one here buys your false dichotomy:

"I have true faith in science, whereas the rest of you are delusional."

Peak oil is the outcome of science.

Haying with horses and a loader are just as technologically challenging as doing it with tractors and a baler. The difference is you don't have to rely on mechanics when the equipment breaks down.