Making people think you're going to hit them is literally illegal
That's just your assumption. What I've read is that he tried to physically turn the camera away from his face and the obnoxious camera woman reported that as a threat.
Either way, banning him from a once in a lifetime opportunity to perform at one of the biggest music events in the world is WAY out of proportion, especially as he was just defending himself from having his privacy invaded in a very emotional moment (just after singing an ode to his dead dad)