That was on new years eve 2016. Yes it was bad. I agree. But imagine what would have happened when everybody would have carried a gun?
Just look how many people die in the USA every year because of guns. In Germany in 2016 it was 70 people. Take this number by 5 because USA has roughly about 5 times more people w get 350 deaths because of guns. Suicides included. Now how much do the USA have? More than 10.000 I heard... And now tell me that does not have anything to do with the insanely high number of guns in the US...