I can understand the fear you have of fat. But these days we really do have a reason for fearing agricultural animal fat. They pump it with growth hormones, antibiotics etc... and animals are fed on grain which lifts up the omega 6 which encourage tunour growth. Chickens are fed on horrible things, treated awfully and should we be eating them? They are grain fed, pumped with antibiotics. It worries me that we will encourage more abuse and feed ourselves food that will encourage arthritis and ill-health ... the big C! Yet, we will be thin. Does a meat eater look better than a person who is eating lots of fresh foods full of nutrients? The facts are that you and I want to care about the animals and would love to go vegetarian but it never works, we are always hungry and fat and protein satisfy us. So, we need to be pressing that animals are fed correctly, as intended, that chickens and all animals are given a chance in nature before killed. How are we going to produce all this meat for everyone? Grain and oil fields would need to go, we need more room. I am no expert, but we have a problem here. If meat and fats are the way to go, we should be very concerned about animal welware and realise that what we feed them will give them the fats that go into us. The other thing is that throughout the years animals are not always fatty, so how come I am going to have to find it? Would the hunter gatherer save fat for summer, when the sun makes us warm and so does a fat diet. In summer we crave salads not loads of fat. There seems to be some issues. Also the high fat/high protein diet is VERY ACIDIC! The masai used bitter herbs and astringent chemicals in their diet of blood, milk and meat (see wild health book).
I am very complexed. I believe that the fat and protein diet works a treat, but the agricultural practises are the trick!