It’s so obvious, one would have to be stupid not to.
They simply don't want to believe that there are people that have been elected to some of the highest offices in the land that are willing to kill their fellow Americans in a quest for power.
That's not supposed to happen in this country, that only happens in other countries. We could never be like Nazi Germany. We could never be like Stalinist Russia. We could never be like Mao's China.
Their minds simply can't accept the reality.