As an American, I can understand why others feel this way. It's a tragedy, on a global scale, that one of our biggest exports is horrific news stories about guns and murder. Can't remember who posted this here, but they said that given we didn't do anything after Sandyhook, we'd pretty much never do anything. I hate that this has largely come true.
If I had pre-twitter Elon Musk-level money, I would try to ensure (within reason) that each Sandyhook survivor moved to a different state and ran for federal office. And try to do that with every child/teenager who's experienced a mass shooting. We need a mass political movement from those who have experienced it.