I won't say "not able to understand things", but often I have the impression like people are so caught up in their narrow worlds - you have your hard time getting them out of it and getting them to think a little step further. Also, they're so caught up in existing terms and putting ideas, attitudes and people into these known drawers, they're like literally blind to understand, first, there are more categories than popular culture propagates, and, second, they've got way more different features summoned in them than what they current categories offer them to sort in.
Literally... it would need for zeitgeist mindset that someone or some group appears on the screen again which turns all these images of what exists upside down, so that people get back again to a dimension of thinking... more "dynamically", as I call it.