Because it continues to reinforce his self-image of being a righteous warrior against the forces of evil liberals.
I wish that was a joke, but I’m pretty sure it’s true. Let me re-iterate an earlier point:
This is key; the nonsense quoted in the OP in the Town Hall article is the sort of material that gets passed around many right-wing sites and, combined with a heavily dualistic worldview, exacerbates the hyperpartisan views of its audience: not only are they the good guys, but by exclusion anyone who disagrees with them must be the bad guys. They define themselves in the most positive light and then ascribe those characteristics or their diametric opposite to people depending on whether the people involved are an “Us” or a “Them”.
To take one example, this is why many Trump supporters insist that Trump - a man who has shown no evidence whatsoever of faith apart from some minor lip service, is profoundly ignorant of the church he purports to belong to, revels in self-aggrandizement and wealth, brags about cheating other and molesting women, and literally owns a golden chair in a golden room in a golden tower built to his own glory - is “in his heart” a devout Christian, but Obama - who spent decades attending church (remember Reverend Wright?), devoted his early career to helping the poor, and has openly declared his faith in Jesus as his “Lord and Savior” - must be a Muslim and/or atheist.
The problem is that not only can you not reason someone out of a position they haven’t reasoned themselves into, there’s nothing you can offer them to persuade them from a position which provides them with a great deal of personal comfort and reassurance and, if abandoned, would reveal them to have been gullible fools taken in by unscrupulous politicians and businessmen. No one wants to believe they’ve been conned, and this is a big - and for many people a lifelong - con.
I do want to add a big caveat or two here: the above does not apply to all conservatives, many of whom are shrewd, smart and self-aware enough not to fall for the Alex Joneses and Glenn Becks of the world. And there are also plenty of lies that insular left-wingers tell themselves, often tied to the same sort of Manichaean worldview, although the machines driving those lies are much less central and well-funded than the right-wing ones are at present.
But Clothahump? His faith in his worldview is a mighty wall that insulates him from all that might challenge it, and reality be damned.
On preview: I took so long to write this that DrFidelius ninja’d me with a one-liner saying the same thing. But I wrote this and dammit, I’m gonna post it.