Earlier quoted context omitted.
As a general rule, one should question their beliefs if their beliefs require some type of derogatory state of mind about some other, disagreeable group. For instance, what is more likely: people drive large cars en masse because they have fragile egos, or large cars are solving some problem they have, namely they have a lot of stuff to carry around? As a personal anecdote: after the first kid, I had to ditch my tiny…
C. It's necessary to drive a car because of poor societal choices made over the past 100 years. When you were a kid, how big was your parents' cars?
My point is that you can never hope to solve a problem if you don’t even understand the fundamental circumstances that caused the problem to arise. Of course, not every person can know every thing, but it’s a good signal that you might be operating under false pretenses if your argument requires people to act in some derogatory way.