Excess population causes humans to become homicidal and suicidal. If assholes only killed themselves, no one would give a shit (indeed, I say "Here's the keys, asshole. Go kill yourself on some deserted road."). The fact of life is, assholes know that they are a waste of carbon: they will amount to nothing in life; they have no reason to live; noone likes them, let alone loves them; they will live briefly and then pass away unnoticed and unlamented--- just one of billions of faceless human beings. And this enrages them. So they take out their rage on nice guys like you and I.
In a perfect world, assholes would all get together and kill themselves in one massive head-on Mack Truck-to-VW Bug collision. Maybe rent out the L.A. Freeway system for three days, and let them go at it non-stop until they are all dead. Then nice people can live peacefully on the road.
One can dream, can't one?