The annual approach of 9/11 brought memories, news recaps and, best of all, in some ways, speculation -- as in, what's the matter with Americans today? Where's now the national unity that marked the aftermath of the attacks, the U.S. flags that decorated pickups and sedans, the spirit of we're all in this together?

Umm, yes. Where, in fact, had that unity gone by the time the so-called victory over Iraq had sucked Americans into a guerrilla war and America's commander in chief was being castigated right and left?

I have a suggestion. It is that in 2001, under attack by -- I do not think it is too much to say -- the powers of darkness, Americans found and asserted their American identity. It took some effort. Vietnam, Watergate and the Clinton years had produced deep national divisions. The 2000 presidential election had dug them deeper still.

Nevertheless, enough national spirit remained to further and facilitate the coming together of the American family in the interest of suitably punishing the murderous foes of that family. We all embraced one another. We were in this thing together. God bless the USA.

There is no purpose in retracing how it fell apart in wrangles and bitterness over the Iraq invasion, etc., which culminated in the Trump election. Oh, how it culminated -- and continues to. Witness the Brett Kavanaugh hearings, which produced varying views as to what should be done with the nominee: confirm him or shoot him into outer space with a toothbrush and a ham sandwich.

The difference between 2001 and 2018 is the difference between "I am an American" and "I am a fill-in-the-blank." The vast community we all inhabited has become a series of subdivisions. Group identity is the thing now. I am less American than a progressive, populist, African-American, Ivy Leaguer, Christian, transgender, Hispanic, vegan, Jewish, "none," Anglo, gun owner, yogan, Asian-American, Native-American, #MeToo -- I'm out of breath.

Identity politics, as we have come to understand it, is the new brand of politics: the demands of a particular constituency (self-styled) asserted over the needs and rights of other constituencies.

It would be silly to say that in some ethereal past we were all of one mind and one heart. It was never so. From the start, we had Protestants and Catholics, planters and industrialists, farmers and cowmen, factory workers and bosses. We generally worked through these entirely human and timeless distinctions, cutting slack for those in need of it. It took time sometimes, as with the incorporation of ex-slaves and their dependents into the American mainstream. But it was done. And it keeps on getting done.

The indisposition to cut slack for anyone else is the main and most frightening feature of today's politics. It isn't just that we don't want to help the other side. We don't want to know there's another side, a thing to respect, even begrudgingly -- something to accommodate as an element of the American design. We're currently raising a crop of collegians whose regard for free speech -- and, likely, other valued freedoms -- can only be regarded as provisional. And perilous, inasmuch as the accommodation of interests and identities, rather than the triumph of one or two over 500 different ones, is the difference between the United States of America and the Russian empire of Czar Vladimir I.

"My way or the highway" is, increasingly, the rule of political thumb in modern society. Secularists, to the extent they can, airbrush Christianity from the American canvas. Progressives -- good Lord, what a name for reactionaries! -- want, for no intelligent reason, to eliminate Confederate monuments. The president wages dogmatic war on the ideal of free trade, meaning the free selection and exchange of goods in world commerce.

You see the linkage here. The American ideal of freedom to pursue legitimate interests turns off people who view themselves and their group as uniquely deserving or put-upon or smarter and more forward-looking than you. Anyway, they are not the sort to drape their cars in red, white and blue the next time terrorists strike, which we must pray for many reasons is no time soon.