Well, this shooting kind of checks all the boxes for what the 2A crowd has been saying:

1. Enforce the laws we already have on the books. What good are new laws, if errors like this are being made in our current system?

2. The shooter had a history of mental illness, with classmates and people that know him saying this didn't surprise them. We need more and better access to mental health care.

3. The shooter was ultimately stopped by a "good guy with a gun." Not only that, but the good guy with a gun had an AR-15, and was an NRA instructor. 

That said, this was incredibly tragic event, politics aside. Hopefully his punishment is swift and final.