yes, the society where beating your wife was a fact of life was certainly a normal one. all the lead in the air was good for your brain too! you know crime has gone down and only continues to drop, right? sorry, but the facts don't give a shit about your fear-mongering
America's debate on guns has gone on well before mass shootings, and that the exact same points are brought up. Back then the big scary weapon was the revolver.
And this shooting displayed that the common police equipment of the time (pistols, shotguns) were ineffective against determined and well equipped criminals. Police wanted handy, precise rifles (AR-15), and better armour for themselves and vehicles in case of emergency.
So the police looked to relatively cheap mil surplus and things that were compatible with them, fast forward a few decades and that is why the police have a ton of military grade gear.
I don't know who needs to hear this but fully automatic weapons (1 trigger press=many bullets until the trigger is released) are not used in mass shootings.
Semi automatic weapons (1 trigger press=1 bullet) are and a majority of guns used in crime and defense belong in this category. I know some people get annoyed because it's seen as nitpicking but even if you are anti gun you need to understand guns enough to make a coherent argument. I recommend having someone you trust take you to a range if you can.
But yeah imagine a group of government officials wanted to regulate cell phones but constantly said tablets like the words are interchangable. Then they start using vague terms like "smart screens" all the time like it means one very particular thing. You see what I mean.