I see it as a spiritual condition. See, the common Trump hater is a replant from the Bush-haters. When I interviewed Bush-haters, they stated they didn't care if they were wrong about what they said about Bush, they only wanted to ruin him. The same is true for Trump haters. They don't care if they are wrong.
Try to understand that the Left thinks like a sport fan who picked a team to cheer for. They go from play to play, forgetting their team's last bad play, and just cheer for the upcoming play. No retention of the last bad play, just always cheering for their team, even if they were wrong. Even if their team stinks.