Already mentioned but heres the stats
Oklahoma City Bombing - no firearm used. 168 killed, 19 of which were children under 6! 680 people injured and property damage of $652 MILLION! If someone wants to commit evil, they will find a way.
If you look back at these people who committed these crimes, they have one thing in common. They all had mental health issues if I'm not mistaken, maybe not diagnosed until after the fact, but nevertheless it seems a common trait amongst these evil doers. Let's address that issue before we have some knee jerk reaction to law abiding citizens. The 2A gives us the right to defend ourselves against harm-including from our own government.