This is the problem: the Second Amendment itself--and the cultural assumptions that underly this constitutional juggernaut.
Most citizens, of most countries, do not "assume" that they are entitled, by the mere circumstances of their birth, to possess and employ lethal firearms. But Americans DO so assume.
Americans, unlike, say, citizens of Japan or Britain or France or Sweden, grow up thinking that their authorization to bear arms is inborn and inalienable--a "natural" right--accorded them by the universe or by what Jefferson sneakily (and deceptively) called Nature's God. Any attempt to deny, limit, restrict or control that "right" is thus considered a threat to an individual's very identity as a free American, indeed as an autonomous human being.
In most other countries, though, possessing a gun is viewed as a privilege or a responsibility accorded to an individual based upon that individual's particular needs, qualifications and training--a privilege not given lightly and granted only to those who demonstrate convincingly that their use of such weapons would be useful or (at least) inoffensive to the common good. Granted by whom? By the central government whose sacred duty it is to "provide for the common defense and promote the general welfare." In such countries, that's what the GOVERNMENT does--not what individual gun-toters do.
A complete reversal of the American attitude (despite the language of the Preamble to the Constitution).
Of course, this is not a new idea. My friends in Europe have often expressed their astonishment that Americans regard gun rights as something as integral to one's selfhood as, say, a right nut or a left tit. It always surprises me, though, that Americans themselves do not recognize, indeed refuse to recognize, how completely "out of it" they are. My God, isn't it clear that, in the 21st century, constitution writers possessed of even a bare minimum of rationality would NEVER include in their foundational document any provision as threatening to "domestic tranquility" as the Second Amendment?
Alas, I doubt that we Americans have any REAL will to change our ingrained thinking so radically. The fearsome toll of gun violence shocks us, yes (sincerely), but still we cannot bring ourselves to espouse anti-Amendment "blasphemy" or take anti-Amendment stands. Instead, in response to the havoc wreaked by the un-infringed bearing of arms, we cling vacuously to moments of silence followed by...thoughts and prayers. It's pathetic, and we know it. But give up our guns? My God, they're like our right nut and left tit!