Why leftists fail at being dogmatic

Thesis is that leftists tend to rely on overly complicated ideas that they expect people to believe without earning it


 * leftists rely on complicated ideas
 * leftists have little means to spread these ideas
 * going after someone for not following ideas they don't know comes off as oppressive and annoying
 * Outsiders often cannot realistically be able to even conceive of following the ideas before they get attacked for not following them
 * leftists don't put up a united front