They don’t care that you know the historical and philosophical foundation of their beliefs. For them, that foundation isn’t there for them. They probably don’t know it!

Hold on, this came back into my mind and I’m not sure how to interpret it. It seems like, someone who feels that they hold an opinion but can’t really say why they do, can’t point to some principle upon which the opinion rests, nor articulate any deeply held beliefs that would direct their thinking to come to such and such a conclusion- that person (and I am not directing this at any particular individual), that hypothetical person seems like a dumbass. Am I totally misunderstanding what is being said here?