He was, because those stories and ideas, if widely known, would threaten the state built on the narrative of virtuous gods and deviations from that narrative would lead to worse outcomes for everyone.

Our state is built on the narratives of democracy and equality thus while those factors have ability to undermine the narrative (as we've seen in not so distant history) we have to censor them and do the research behind closed doors, otherwise we risk more damage than any possible benefit.