If I remember correctly, the thinking process was that when we cook we kill a lot of bacteria which is essential to our body getting stronger so the Jews came up with the conspiracy to cook all the food to kill the bacteria that is supposed to make us healthier, in order to make foreigners weaker while the Jews continue to eat raw meat in secrecy and get stronger.
I've tried raw chicken at a restaurant in Japan before, and let me tell you: it tastes exactly like raw chicken smells. It was awful lol. The horse sashimi actually had flavor to it, but chicken sashimi was not for me