It's Putin's fault.
Naturally. He and Trump orchestrated this

The trucker should have slowed down long before the asshole in the car came to a complete stop. You see brake lights glowing without fluterring ahead? Slow. The. Fuck. Down.
On the other hand, and as others have noted, the prick in the car was one of those selfish jackasses who *knew* they had to merge to reach their exit, but they weren't willing to wait in line like everybody else.
Legally, the truck driver will probably be reamed; karma-wise, the dickhead in the car got what he or she deserves.
And don't be so quick to assume the person in the car was someone of bone in the nose Hottentot ancestry. It likely was, and a woman to boot, but it easily could've been a dumb white or Asian bitch behind the wheel. The latter are notoriously awful drivers, worse than the most entitled burr heads of ditzy teenage white girls.