Oh fer crissakes RL
Of course it is terrorism. The men felt they had to do something about what they perceive is a threat to their way of life.
Does that excuse their behavior? Of fucking course not. But they feel the way they feel, they over reacted they did terribly wrong. They should be punished and rightfully so.
People feel threatened. People lash out. It happens all the time. It is an imperfect world. Americans love justice. This will eventually balance out.