I will never forgive VW for cheating on diesel emissions. That corruption went so far throughout the org the entire company should've been criminally indicted and shut down.
You're both completely right, while you're completely wrong.
On both total emissions as well as emissions/ton/mile metric, long-haul commercial fleet diesel trucks are far better than the millions of polluting and poorly maintained small displacement privately owned diesel cars and pick-ups.
And because of this scandal VW pulled their diesels, AND both Mercedes and BMW followed suit.
Quite sad, because an X5 diesel had really good mileage (if you used it for longer distances).