Toddler shot and killed in Road Rage incident

Super sad story. Toddler killed because his Grandma took too long, for another driver, at a stop sign. The person honked at her. She honked back. The person got out and shot into her car, hitting the toddler in his seat. He died at the hospital. 
Personally, situations like this are the ones that make me dislike people having guns. Some people take this gun thing to an entirely new level. Guns aren't necessary for every situation and if this is how people deal with conflict, we are in trouble as a society. I am NOT saying people should not have the right to arms and protect themselves. However I AM saying we have a problem as a society. No one threatened the shooter. The whole thing was senseless and unnecessary. We can agree to disagree, but thoughts ?