Convincing them they were duped makes them feel like a dupe. And they refuse to do that. The trick is to convince them they were betrayed. That leads to anger which can be pushed into whatever direction you want. It is what the Right does all the time. The left should use this tactic and retake all phases of government. Then push their agenda through, prosecute the criminals, break the oligarchs, corporate media monopolies, and eventually then back off on hate. But put it in the books that the republican party is the party of oligarchs, the party of felons, the party that bankrupted farms and broke families. Put that shit on youtube ADs, and hire good writers/actors to create ads about how they harmed America. Make it funny. Make it constant. Show them how the republicans lose wars, raise taxes, raise debt, and how they create bad faith negotiations with little school plays for elementary students to act out. Kids, drugs are bad, but republicans are worse.