I think part of it is that they are dedicated to their partisan view of the world to the extent that they cannot disengage from their party leaders no matter what. They have a Gay kid, for example. They feel that Christians disapprove of Gay Sex and therefore (in their mind, Gay people) and thus condemn Christianity entirely and all associated with it. The Right also does not facilitate homosexuals being a special protected class and therefore everything about the Right is condemned. Once that alignment is made, their people must be forgiven every failure as to not do so is to support the opposition in their small world.
A few years ago there was some kind of mockumentry (because surely they could not have been serious) that stated that people did not eat breakfast before the 1900s when "Big Ag" began to advertise and they only did that to increase their profits by getting people to eat more.
Please ignore, the books written before then that mention breakfast, that breakfast is eaten around the world, that we have cook books from before that time with recipes that are for breakfast, that we have newspaper articles talking about people who attended "Breakfast" and what they ate and the menus and rule books for workhouses and other charities and prisons that all tell you what you should serve for breakfast.
It is not only a little bit of evidence that they are wrong, there is a crap ton (that is a scientific term for a whole lot) of evidence.
But people who saw the show will look you right in the face and say, "But they showed it on TV so it must have been right".
People are not that bright.