The problem really is that we need to accept that they are "stupid" but in an empathetic way, remembering that we were once stupid and ignorant. We took it for granted that other people wouldn't confuse correlation with causation, blaming Biden's presidency for inflation. But all of us thought correlation was causation at one point until somebody educated us on science. When a topic was confusing and complicated, we leaned on correlation to guide us until we learned better in formal education. It would be immensely difficult to explain to someone why groceries have become unaffordable without extensive exposition, but it's a hard problem that we should try to solve instead of just calling people ignorant in frustration.