Like Tony worries about the safety of others or himself.
https://www.youtube.com/watch?v=9mRY79mat34
https://www.youtube.com/watch?v=wwc8obMmv7o
I don't see him intentionally trying to hurt people on these videos, also if you want to talk about safety, the worst thing one can do is to walk around a race track with cars on it (even if it was under yellow flags, it was less than 30s), the only possibility I can see of blame for Tony Stewart is if he was indeed trying to intimidate the other driver and misjudged it, but my initial reactions is that the other driver just put himself into to much danger and payed for it, Stewart didn't have much room to react, still very unfortunate the whole thing... hopefully it will help to improve the safety standards regarding driver's behavior,