I really don't think it matters if it was a lawful order or not, that is where I was going with the disagreement with using proximate cause as the justification for the pepper spray.
What we don't see in the video is if any of the officers tried to arrest any of the sitting students. If they did and they fought back (an actual attempt to fight back is required for resisting, not cooperating is not resisting) then the pepper spray was earned.. I highly doubt that the LEO's tried to arrest the sitting students though, I think they skipped a step which is why I disagree.