Unfortunately, you can't reason with these "people" anymore. You could shoot a potato gun full of truth and proof right up their asses and they still refuse to believe it. I gave up even bothering.
Until something happens that is so horrifying and life-changing to these NPCs, absolutely nothing will change.
Tim P(T)ool and his retched smelly beanie might catch wind of this and start crowing CiViL wAr every five seconds again.