I assume you are saying my question was unproductive? I asked the question because Obama used this incident to bring up "common sense changes to gun control" and, as far as I know, he has never proposed a change that would have stopped this incident. So, why bring it up now?
After Sandy Hook it made sense to talk about banning assault rifles since that was what was used.
After a passion killing where someone goes out and buys a gun on short notice it makes sense to talk about waiting periods.
After someone with a long history of mental illness or violence obtains a gun and kills someone it makes sense to talk about background checks.
After a felon or someone with a long history of mental illness or violence buys a gun at a gun show and kills someone with it, it makes sense to talk about closing the gun show loophole.
I guess in this case it would only make sense to talk about a complete ban, or a complete ban on handguns, or setting up so many hoops to jump through as to make it an effective ban - because those are the only things that would have prevented this terrible incident. And I haven't really seen those types of changes seriously discussed.