"I’d call them dangerously loopy heretics who are well down the slippery slope to hell, Bob. A hell of their own creation, even if you don’t believe in the literal sulfur-and-brimstone variety presided over by a big red guy with horns and cloven hooves. Which these people very likely do, but they think they’re on the side of the angels, which makes them doubly bad."
January 1, 1970
https://en.wikiquote.org/wiki/Charles_Stross