All right well I'm not defending him, but put yourself in his shoes. Sure he put you in a strange position but from his point of view you basically did the same thing to him.

Imagine: your one and only job for a time is to keep a convoy of VIP's safe, for which there are a ton of rules to follow and scenerios where the vehicles could be put into danger if people do certain things, like enter the convoy or come rolling up on it, and you've already had like 20 people who don't know to stay out of a convoy like that, come and potentially mess things up.

I'm pretty sure you'd yell to try and correct them. Personaly I would've stopped people from getting on the shoulder in the first place instead of allowing them the opportunity.