There’s a pretty massive difference between “I managed to build a simile of a single-shot rifle from scrap and kill a person with it” and “This legal assault rifle allowed me to perform mass murder in a public space”.
You talk about arms for self defense, but the rest of us don’t go around worrying about not having a 9mm or rifle in our car or next to the front door. You guys have built a problem with arms over there, and until something radical is done you’ll keep having an arms problem.
One can only hope