Yudkowsky talks about this with religion. Tell someone their religion is wrong and they dig in their heels. Those of us who left usually learned other tools of rational thinking that raised the waterline of our thought quality until religion drowned on its own without ever being pushed under. Usually debate tactics are direct attempts to push the target under water, the opposite approach. I think we can help people in this way by teaching them informed consent as a general principal and so on until the idea of government will suddenly and naturally seem silly to them by their own conclusion. As Yudkowsky talks about it you often have to think about the irrational thought as a trap. Any bump into it will trigger their brainwashed in belief defenses. So you must teach away from the target and let them wake up one morning connecting the thought process to the busted thought all on their own.