As for politics, it all boils-down to the semantics of disagreeing.
People generally have spring-loaded gripes, quips, comebacks to use in conversations. I can't think of any winding lectures that seem to pre-planned venting strategies during interactions with lib friends.
-Have an issue with orange-juice, lecture me about Florida. I haven't had any of those type of situations recently.
But if they voice a complaint about crime, or gas-prices... inflation, or long lines... I'm there with a torpedo.