Complex sentence: He also objected to what he saw as scientism, fanaticism, and nihilism by a few in advancing transhumanist causes, and said that historical parallels existed in Millenarian religions and Communist doctrines.
Split into simpler sentences: He also objected to what he saw as scientism, fanaticism and nihilism by a few in advancing transhumanist causes. Dublin also said that historical parallels existed in Millenarian religions and Communist doctrines.