Stupidity. And not "someone who doesn't have an advanced degree and understand quantum mathematics" sort of stupidity... more like "someone who can't tell that the part of the saw with the blade is the wrong end to hold" sort of stupidity.
And... that's a thing. Those people breed, raise stupid kids, who then breed some more. And eventually get elected president of America it seems.
So lets just remove the warning labels. Let them weed themselves out of the reproductive cycle. We can start with these: