Because I want to hit them back, and hit them first, at the core of their ideology. Fight the enemy, not his ever changing weapon of choice. Destroy his ideology through overwhelming force, and education. American children need to know who we are fighting, and why we are better than them.
Yes, we are a civilized nation. But we have to stop fighting the ideology of barbarism with platitudes. We have to coin it. And destroy it. Teach our children 21st century modernity trumps (no pun intended) 7th century barbarism. This starts with our CIC!
THEN, when that is all done we can start debating how to reduce common gun crimes again. First comes ideology. Through ideology intent to kill forms. Then the weapon by which to kill is chosen. We have to start fighting back at the top first. Dead jihadis can't get AR-15s.