I don’t know much about the author and as far as I know haven’t read any of their other work, so while it’s certainly possible they’re pushing some shitty “AI will save us all” techbro agenda, I really don’t feel convinced of that based on that Washington Spectator article or the short paragraphs near the end of the mountain of text preceding it on the Slate Star Codex. There’s a lot of guilt by association implied in the page about TESCREAL but I’m not seeing any alarming smoking guns re: Scott Alexander and his Wikipedia page doesn’t seem to call out any concerning incidents or positions (not to imply all of its content is complete or truthful).
I’m not invested in this enough to try pushing back more but if you want to claim the author is roughly equivalent to an Elon Musk or some red pill monosphere proponent I’d expect more evidence. It’s good to be mindful of sources of info in general though, I agree with the sentiment of “follow those seeking the truth, avoid those claiming to have found it.”