"Whenever any American's life is taken by another American unnecessarily—whether it is done in the name of the law or in the defiance of law, by one man or a gang, in cold blood or in passion, in an attack of violence or in response to violence—whenever we tear at the fabric of life which another man has painfully and clumsily woven for himself and his children, the whole nation is degraded."— Robert F. Kennedy on the assassination of Martin Luther King Jr. (1968)

There's a subtext to this assassination attempt on former President Trump that must not be ignored, and it is simply this: America is being pushed to the brink of a national nervous breakdown.

More than 50 years after John F. Kennedy, Martin Luther King Jr., and Robert F. Kennedy were assassinated, America has become a ticking time bomb of political violence in words and deeds.

Magnified by an echo chamber of nasty tweets and government-sanctioned brutality, our politically polarizing culture of callousness, cruelty, meanness, ignorance, incivility, hatred, intolerance, indecency and injustice have only served to ratchet up the tension.

Consumed with back-biting, partisan politics, sniping, toxic hate, meanness and materialism, a culture of meanness has come to characterize many aspects of the nation's governmental and social policies. "Meanness today is a state of mind," writes professor Nicolaus Mills in his book The Triumph of Meanness, "the product of a culture of spite and cruelty that has had an enormous impact on us."

This casual cruelty is made possible by a growing polarization within the populace that emphasizes what divides us—race, religion, economic status, sexuality, ancestry, politics, etc.—rather than what unites us: we are all Americans, and in a larger, more global sense, we are all human.

This is what writer Anna Quindlen refers to as "the politics of exclusion, what might be thought of as the cult of otherness… It divides the country as surely as the Mason-Dixon line once did. And it makes for mean-spirited and punitive politics and social policy."

This is more than meanness, however.

We are imploding on multiple fronts, all at once.