He may not of came up with those things but the party he represents perpetuates those types of stereotypes, thus the anger at him. Him failing is somewhat appealing to them, it obviously doesn’t make their lives better or easier however in some strange way it gives some satisfaction.
This guy who acted like he had all of the answers because “He’s been there before” and “He’s an adult” or “He’s old moderate Joe” hasn’t done well on any front. The Afghanistan withdrawal (I believe there are still hundreds of Americans stranded there), illegals flooding over the southern border, inflation going crazy, China firing rockets all over the place, Covid killing more people now even though a majority of the folks have received vaccinations….. it just keeps going.
It’s not unrelated, it’s tribalism.