So you don't know about the importance of fire for early humans? There's a lot of evidence of cooked bones and for fireplaces, coprolites also provide a lot of information. It's hypothesized that long before humans could reliably produce fire, they would collect and kindle it. Some ancient religions also have traditions of keeping a flame alive. Our teeth also reflect our long heritage of softening foods, cooking, eating starches, etc. The gut has been mentioned above, then there's also our body temperature.
The last sentence is strange and either sounds like trolling or an extremist conspiracy theory, accusing everyone who's not in the paleolithic diet fad of being liars in everything. That's like other fundamentalists fighting against reality and claiming that everything is a lie but their own doctrine, even if they're obviously wrong.
I sometimes risk eating some raw meats, usually cured in some way, sometimes not. As a delicacy, not as a main diet. Doing so would contradict a lot of science, even though nutritionism always has its fads...