I think this is more than simply stupidity. I think I put it best by saying that this is problem of valuing particulars over universals. This is a cultural problem of valuing the result and not the idea. This can be seen far outside of just Thomas Jefferson.
I use the word problem here loosely.
“There are only two kinds of people, those who accept dogmas and know it, and those who accept dogmas and don’t know it.” – G. K. Chesterton - The Mercy of Mr. Arnold Bennett, Fancies vs. Fads