De Mille had a grudge against Carlos, and rumor has it, he was a scientologist who helped L Ron kidnap his wife.
His criticisms of Carlos are childish. For example, the talking lizards were not actual lizards. It was the Ally. Carlos released them to his private students, and I have that entity in my home, taken over by a witch Carlos taught.
Anything else he had to say was equally dim witted. AS were Gordon Wasson's claims you can't smoke magic mushrooms. Of course you can when they're powdered!
This sorcery is Olmec, not Yaqui, not Toltec, and it's 10,000 years old. Easy to prove.
So don't take anything De Mille says seriously. It just shows how willing to trash Carlos everyone was. And how some liked to cash in on that.