You seem to associate eating fat with BECOME fat. The two are very different, and the saturated fat that can be consumed to reach the 500 calories (~70g of butt

You seem to associate eating fat with BECOME fat. The two are very different, and the saturated fat that can be consumed to reach the 500 calories (~70g of butter vs ~150g of bread) should not be feared. This too is very much a corner stone of Paleo and the proof is in a lot of ancient cultures, especially cultures that had to survive through all four seasons.