Anarchists talk as if there is something fundamentally worthwhile in human life. They employ terms like 'virtue', 'goodness', 'potential' and so on. Anarchism is based on the premise that if it weren't for pesky and interfering governments, human life would be substantially better, if not indeed unrecognisably so, from the current picture. It's based on a fundamentally optimistic view of human nature that has very little evidential support.
-Karl, in a comment on his post
This insight extends to almost every belief structure there is, because almost every belief structure is fundamentally (and shamefully) optimistic. Feminists and men's rights people seem to think life would be grand if it weren't for pesky, interfering patriarchy/gynocracy. [Group A] thinks life would be grand if it weren't for pesky, interfering [Group B] fucking up the program, and vice versa.
I think of this as "team thinking" - the idea that (a) we are on teams (what Vonnegut calls granfalloons), and that (b) our team should win against the other teams, which (c) totally exist, and (d) then life would be great.
This "team thinking" is a huge part of the reason that we get bad information and cannot think clearly. This is because of the practice of civility, which is a form of bullshit.
Civility means that we avoid saying things that cause our conversation partners to experience negative affect. Unbiased information about oneself is particularly difficult to get, because negative information about oneself is likely to cause one to feel bad, and is hence "impolite" to discuss. Team thinking extends this zone of bad information to information about all kinds of spurious groups we happen to belong to, not just the individual - gender teams, race teams, political teams, geographic location teams, socioeconomic teams, religious teams.
In-groups (the existence of, and bias toward, which are on the list of human universals) represent an important part of self-deception, in that it allows us to imagine that others deserve suffering.