The idiot in the pickup truck because a) he pulled into traffic before he had enough distance; and b) because he doesn't know how or can't turn properly by staying in his lane. The idiot in the car because a) he/she had the right-of-way and he/she was going to show that dummy in the truck. If he/she had just slowed down and waited for the truck to stabilize in one lane or the other, there would not have been a crash.
The person in the car had to show the person in the truck he was right even if it killed him. If he lived his first call was to Morgan and Morgan for the people $$$.