I am going to vote the other way from you. Why?
1. Disparity of numbers. A good legal reason to use deadly force.
2. The motorcyclists pursed him.
3. He was stuck at a traffic light and had no where to go. He tried to retreat & they followed him. Further retreat was not possible.
4. It is no trick at all for a motorcycle to block in a car -- not so much a guy on foot, but the bike is not an obstacle that a SUV can run over and get away. Both will suffer extensive damage, and the SUV can easily be immobilized by running over a bike.