Those of us who end up in the conservative camp, by conviction or by default, know damned well that he or she is fallible, that is capable of making a mistake. As a result each of us makes the effort to obtain all the valid information possible and to separate truth from falsehood.
But the folks on the other side see themselves as perfect, superior, or infallible. They don't bother to make the effort to see the truth because they feel that they already know the truth. Thus they stumble about from screw-up to screw-up. And they are utterly mystified as to why we won't willingly follow them into the hole.