Cognitive dissonance. Nothing matches up anymore to what they thought they knew.
I think getting to the bottom of what actually happened on Nov 3, 2020 is a must do for most normies now. That will be the event that makes them reject what they thought they knew.
In retrospect, it may have been the best white hat move to let it get to this point. If the normies accept that the election was purposely stolen it will go pear-shaped for the perps with no hope of recovery.