Their foundational problem is that they can't do math; not even basic arithmetic.
Us older folks remember when making a purchase, if the amount was 77¢, we would give the cashier $1.02 and the clerk would immediately give us back a quarter.
Try that today. Cashiers give you a bemused look, hand you back the 2¢, and advise you, "You gave me too much".
So what?
Math is the basis for everything in the world. If you can't do math, you'll believe every lie the political Left throws at you.
You also can't balance a checkbook, calculate, in your head, which product is the better buy at the grocery store, figure out whether Social Security is a good deal, calculate whether you'll be able to pay back your student loan, calculate your taxes, or much else.
The intentional "dumbing down" of student numeracy is the foundation for the "dumbing down" of everything else, and the creation of "Stepford" Democrat voters.
Math is weightlifting for the brain.