Earlier quoted context omitted.
It was crystal-clear to me. Maybe your judgement is clouded because of bias?
The bias that the only country that has regular large-scale shootings also makes it easy for it's citizens to buy guns! And then there were a bunch of other facts not at all related to guns that have no bearing on it, culminating in an ill-advised moralising conclusion that it (it being a lot of deaths and what I have to assume is bad policy) is deserved because of all those things.
Probably every generation in history looks back in time at every other generation and has no hesitation in coming to this conclusion. It is only with our current generation that our cognitive biases and emotional nature tell us to believe otherwise.