Without shouting, I think I will just point out a few facts:
First, while terrible, mass shootings only account for .018% of all deaths in the USA.
Second, this most recent offender broke gun laws already -- there is no reason to think he wouldn't have broken even more had they been in place.
Third, few get into the connection between prescription medication and gun violence (or any kind of violence, for that matter), even though suicide and aggression are often listed as side-effects of the very drugs that are supposed to help people deal with their mental illness.
I trust I didn't hurt anyone's feelings. Just trying to present facts in a logical light.
Classical Liberalism 101: Facts about Gun Violence in the US of A