Not true ~ there is no "true" paleo diet ~ it varies vastly from culture to culture. Look at the Eskimos ~ their traditional diet was mostly animal, high in nutrients, protein, fat, and sugar in the form of glycogen, and very little in the way of plants. Then in other tribal cultures, they may subsist mostly on plant foods.
There's no One, True Diet. Veganism is actually rather unhealthy, because it excludes foods which contain highly bioavailable forms of nutrients not found in plant foods ~ Omega 3s, iron, etc.
An animal-based diet isn't unhealthy ~ it can be the most nutritious of all. Organ meats are extremely nutritious.
An animal-based diet isn't the problem ~ modern human societies run by greedy corporations and governments are, because they have created and supported the problems of animal abuse, because it is profitable.
> The modern "paleo" diet loaded with animal fat and protein is a modern invention that serves mostly to help people rationalize their taste preferences.
Bullshit. Paleo isn't all about fat and protein. That's keto. Paleo can be full of healthy carbs.