All the political quests are Harry's methods of dealing with pain, with varying degrees of success. They're all cope. However the communist quest is the only one though where he tries dealing with his pain in a productive way, that is, he tries to remain optimistic and tries to at least understand other people. He comes across as goofy and arrogant when he says communist stuff, but that's to be expected.

He's an alcoholic cop who had amnesia and suddenly decided he's the reincarnation of Kras Masov. He's never read theory, never organized. His heart is in the right place but he's a dumbass.

The other quests are unhealthy ways of dealing with pain, especially fascism. Fascist Harry becomes a shell whose life revolves around racial hatred. It's the only quest where Kim will chew you out, beyond a professional capacity. He'll get sick of your shit and will berate you outside the church. Kim is the most patient man on Earth and the fascism quest has you betray even his trust.

The moralism stuff is just Harry trying to live in the memory of his marriage. Ultraliberal I interpreted as trying to ignore everything that's happening, compete dissociation. "This is good, actually" as an ideology.