The USA has a big problem with society and family and evil.
This kind of thing never occurred before psychotropic drugs became doctors candy to replace parenting.
So it is OK if kids use propane tanks, gasoline, knives, swords, cars, trucks, chemicals, poisons, fire, etc. to murder instead.
Until America returns to teaching the Ten Commandments, God in schools, parenting, to give a moral compass and empathy installation into the children - evil will continue to thrive.
But no one has the strength to battle these real causes of breakdown because it is difficult. So the easy scapegoat is blame a tool.
I don't think anyone will ever succeed in America in taking away a Right like the 2nd that protects all others. Doing so would activate it and then a new government of the People will take over after they abolish the tyrannical one.