Nutrition should not be guided by religion. This is very correct. I doubt studies that come out of Loma-Linda University for that very reason, even though they have been vetted by the industry.

Eating like your ancestors is a good starting point. That will optimize your chances of reproduction. Evolution doesn't select for longevity which is a very different endpoint.

I've seen enough of Dr Ken D Berry, Family Physician. He is not a nutrition researcher, he is a YouTuber. He is good at speaking and convincing people of things. He doesn't know what he's talking about and is far too sure of it. He rejects epidemiology for good sounding reasons, but doesn't explain the much worse problems of the studies he chooses to accept. The idea that meat must be good because we evolved eating meat (our ancestral food) sounds almost unassailably correct... but there are ways to assail that theory. Evolution selects for reproduction not longevity. And also our ancestors might have eaten huge amounts of vegetables and fruits that didn't fossilize, we don't know they ate a lot of meat. And also higher meat diets might be perfectly healty as long as you are skin and bones and near starving like an Amazon hunter or an African tribal person. Do you see how eating a lot of meat isn't obviously healthy, how that theory could be wrong? But the biggest reason to disbelieve it is the mountains of research on humans done over the last 80 years that show it's not true.