Since only about 1% of all murder occur in mass shootings I wouldn't say it's common
Murders in mass shootings make up about 0.15% of all murders in the US, and fell 35% from 2017 to 2018.
A parent - and I suppose (and hope) you are not one - doesn't take statistics well, when one of their issues has been slaughtered by someone with a gun, while seated in a school classroom.
That a nice
argumentum ad passiones fallacy you have there - I even like the color!
Rational, reasoned people are not swayed by such fallacies -- why are you?
I'm sorry you don't like the fact so few people are killed in mass shootings -- I know you'd love to stand on the bodies of innocent victims and bathe yourself in their blood as you scream for more gun control; it must really piss you off that reality just won't cooperate.
Reality is when a parent outlives his child, especially when the parent is mocked for their grief, and cries out for gun controls.
It's not always mass murder which snuff outs a child's life by gun violence, accidents and suicides contribute to that grief. It's pricks like you who are the real cry babies, whining about the possibility they might be inconvenienced just because someone is killed by gun.
BTW, nowhere in the 2nd A. are guns mentioned. Why do you believe guns get special treatment?
Think of all the arms of war regulated, licensed or prohibited.
Doesn't the 2nd A. deny you the ownership or possession of a Surface to Air Missile, a Fragmentation Grenade, and/or a 50 Cal fully automatic machine gun?