However, at the very least, we could wait until the facts of the case are known so we don't have blowhards going off about violent rhetoric in politics or violence in entertainment that turns out to have played no role in the actual shooting, for example.
I think there something to be said about "gun culture" in the US. It may have less to do with amount of guns and more to a societal issue. Israel and Switzerland both have very easy access to guns. Citizens are allowed to own them freely and gun ownership is on par with the US yet they have a much lower homicide rate. Not sure if gun control is the end all be all answer but I think it is a start in the right direction for sure.
I agree though that making baseless statements before all facts are known is advisable but in the general sense an actual conversation about guns in this country can be had today.