I would call the obsession with assault rifles and automatics a mental sickness which should be a disabler from allowing a person to own a gun in the first place.
not a gun owner, are you? define assault rifle. you do know that except in very limited and highly licensed circumstances, automatic weapons are already illegal?
There is a legitimate argument to be made for free speech being dangerous. bible burning in FL got people killed overseas. the KKK propaganda caused death in the south. i'm sure there are other examples. would you be ok with limiting speech so that dangerous things are not said?
you could make the argument that certain religions have become dangerous. would you be ok with limiting religions? maybe banning just a few of them...not all, just a few?
the founders, having already experienced repression under various governments, put into the bill of rights the things that they felt were most important to preserving freedom. among those things was the right for the individual to be armed. some of them thought it a duty.
leftists will tell you that it is a ridiculous idea that the people can make any difference against a modern army. you need only look at places like Afghanistan or Syria to see that this is not true.
why do you think that every totalitarian government disarms it's people? why do you think the UN is so hot to have the US disarmed? think out of the box a little bluebee...........