do you have any other examples? because the car example, honestly, doesn't really compel me in any direction other than to point out that if it's his money, he should get the car he feels most comfortable with.

he asked your opinion, you gave it, he told you why it's a stupid opinion, and although that's shitty, it sounds like you knew going in he's a honda/toyota guy, so it's not too surprising that he's more comfortable with his own history than to change direction on the advice of his 19 year old son.

though you aren't wrong for being frustrated, and though it sounds like he lacks tact, i'd be interested in hearing another example of him doing something like this.

in the meantime, i have a consumer reports account and looked up scoring on both cars; the honda does rate slightly higher in a few categories - though you could also use hard facts like these, calmly, to point out (and show him, though you need a membership to do so) that the acura is nearly as good as the honda, according to people who know more about cars than either of you.