As expected, it was awful. Scotty Roberts opened by protesting that he hadn’t known it was going to be a debate, so he didn’t have any “facts” on hand, and besides, it wasn’t an argument built on facts, but was a theory and philosophy — this was something of a theme for him, dismissing mere science and claiming that the ass-plucking he was doing should be called philosophy. He actively avoided making any specific claims about what he was arguing for — he did not talk about UFOs, Nephilim, Roswell, or any of the details he promoted in his book, preferring instead to recite vague creationist claims (“there were 600 flood myths!”) and complaining about having to provide evidence, of which he had none.
This was true of the nineteenth century antecedents of the ancient astronaut theory, such as Theosophy and Donnelly’s Atlantis theory, which had explicitly Aryan pretensions of proving the superiority of the white race. (As did the mainstream archaeology of the time, with its imaginary white founders of every native culture.) However, the modern ancient astronaut theory, while repackaging those old claims, has expanded them to include traditionally “white” ancient peoples such as the Greeks and the builders of Stonehenge. (Since they were white, earlier theories simply counted them as part of the master race.) If ancient astronaut theorists are still overwhelmingly obsessed with depriving non-white peoples of their accomplishments, they are not exclusively so; they don’t think much of ancient white people either. Everybody was stupid until the aliens (as Erich von Daniken argued) had sex with us to inject some bigger brain genes.
By contrast, “lost civilization” proponents like Graham Hancock and Afrocentrists like Ivan Van Sertima fall prey much more to accidental or explicit racism in their theories because they deal with human beings and must choose winners and losers among them. Hancock supports the idea of ancient “white civilizers” who delivered civilization to Latin America and the world, while Van Sertima argued for the same, only black. This is much more racist than the idea that fish-people from Sirius were responsible for all civilization, not just the parts that aren’t European.