The last to be concerned about with the American diet is the amount of meat.
It is the high sodium, high sugar and highly processed franken-food.
That is what is killing everybody, what has caused such dramatic increases in diabetes and heart disease.
Actually the amount of meat eaten is a factor in heart disease
Not nearly too the extent of high sodium/sugar.
Our bodies are designed to process meat. Sure, it was never meant to process two big macs for lunch, a steak for dinner and bacon for breakfast, and then sit around and watch TV all day - but that is not a reasonable amount.
Diet is about moderation and balance... including meat. As well as caloric intake, and how active you are.
Look at the folks who live in the extreme north, they live on a high-high fat diet with a LOT of meat. And they have less problems than we do. But they are also 3 times as active and their bodies burn a ton calories staying warm.