Typical "it's because she was black" response from the media/usual suspects.
When a police officer has been called to the classroom to remove you, it's abundantly clear YOU, the student, are disrupting the flow of activity, AKA LEARNING, in the classroom. Clearing the room is not the solution. You need to follow the teacher's instructions to relinquish your phone and go to detention/principal's office/etc. If YOU have let the situation reach the point where a cop is forced to remove you physically, that's on you. Regardless of your race, creed, color of skin, whatever.
Calling it some kind of hate crime/hate motivated arrest is ing absurd. GTFO of the classroom with your disruptive diva bull . At the same time, was it excessive? Perhaps. But it is ENTIRELY on the student for escalating the situation to the point that the school cop was even called into the classroom.