He had probably torqued them off so badly by that juncture that they were in no humor to do anything for him. But that's not the point. He flouted the rules and directed vulgarity; perhaps even violence, toward his teachers. That's enough to get him a suspension in my book, even if it turns out that the teacher behaved inappropriately.
During his once-a-month-and-for-all-he-knows-last call from his sole surviving parent having had his phone wrestled from his hand by some totalitarian thug, a few "give me back my phone you fat f@%&ing cow"s were more than in order.