Sounded like you were pretty scared....my girl gets this way too when confronted with road rage (she carries OC spray too!!!)
Hopefully the weapon you now have in your tank bag helps to make you feel safe now
Just kidding, but dang I really do get surprised how many grown men get frightened so easy nowadays. Your way was probably the "right" way, but I'd have a hard time letting someone bully me like that. Gun or no gun a fast hit to the nose will drop and disable most people and I think you were justified at that point