James fields made a decision to get in that car, and accelerate toward a crowd of people. The mayor is not responsible for james field’s decision. As you’ve mentioned, the mayor was ordered by courts to have a police presence and monitor the event, so the mayor was forced to put that helicopter in the air. If the alt-right had cancelled their event, that helicopter wouldn’t have been airborne. The helicopter accident is a tragic accident and those officer’s death are not political chips for either side to play now.
The fact remains, James Field chose to get in that car and use it as a weapon. He is responsible and you cannot blame his actions on the mayor.