IMHO, it's not the start that was the problem.... As I saw it in the video here are some of the mistakes leading to the whole incident:

1 ) Tristian did have a very small overlap, maybe a couple of inches maybe less than that, with the gray car.

2 ) The yellow Rx7 swerved.

3 ) The gray car overreacted and swerved into the VW which had been there... causing the pitt manuver type spin into the fence.

What did make this worse for lots of people was the fact that it was a start and lots of cars were in close proximity togeather. I didn't see who tapped the car taking the video. I thought he was free untill he went sideways.