It’s difficult to ascertain from the vid., but the white/blue #45 approached slower. Then, I hear an engine accelerate (presumably Stewart’s) and then a higher speed clip on the higher line. It seems like the car was moving upwards rather than the driver walking into his direct line.
I’ve attended many a dirt track race and know that drivers do get rowdy with one another and that there are rivalries and even ongoing vendettas. It’s part of the culture. I can’t say I recall another driver being run down at speed by the car that put him into the wall. I’ve driven road courses myself. All I can say is, the Ward kid certainly lost his better judgment, his actions made his death possible. But, Stewart was in control of his vehicle. I saw no evasive move, braking or even letting off the throttle until after he’d hit him. It’s not as if he didn’t know there was a car against the wall since he put it there.