President Obama delivers a statement at the White House about the killings at an African-American church in Charleston, South Carolina. PHOTOGRAPH BY ALEX WONG/GETTY

Between 1882 and 1968, the year Martin Luther King, Jr., was assassinated, three thousand four hundred and forty-six black men, women, and children were lynched in this country—a practice so vicious and frequent that Mark Twain was moved, in 1901, to write an essay called “The United States of Lyncherdom.” (Twain shelved the essay and plans for a full-length book on lynching because, he told his publisher, if he went forward, “I shouldn’t have even half a friend left down [South].”) These thousands of murders, as studied by the Tuskegee Institute and others, were a means of enforcing white supremacy in the political and economic marketplaces; they served to terrorize black men who might dare to sleep, or even talk, with white women, and to silence black children, like Emmett Till, who were deemed “insolent.”

That legacy of extreme cruelty and unpunished murder as a means of exerting political and physical control of African-Americans cannot be far from our minds right now. Nine people were shot dead in a church in Charleston. How is it possible, while reading about the alleged killer, Dylann Storm Roof, posing darkly in a picture on his Facebook page, the flags of racist Rhodesia and apartheid South Africa sewn to his jacket, not to think that we have witnessed a lynching? Roof, it is true, did not brandish a noose, nor was he backed by a howling mob of Klansmen, as was so often the case in the heyday of American lynching. Subsequent investigation may put at least some of the blame for his actions on one form of derangement or another. And yet the apparent sense of calculation and planning, what a witness reportedly said was the shooter’s statement of purpose in the Emanuel A.M.E. Church as he took up his gun—“You rape our women and you’re taking over our country”—echoed some of the very same racial anxieties, resentments, and hatreds that fuelled the lynchings of an earlier time.

But the words attributed to the shooter are both a throwback and thoroughly contemporary: one recognizes the rhetoric of extreme reaction and racism heard so often in the era of Barack Obama. His language echoed the barely veiled epithets hurled at Obama in the 2008 and 2012 campaigns (“We want our country back!”) and the raw sewage that spewed onto Obama’s Twitter feed (@POTUS) the moment he cheerfully signed on last month. “We still hang for treason don’t we?” one @jeffgully49, who also posted an image of the President in a noose, wrote.

South Carolina has undergone enormous changes in the decades since Jim Crow, but it is hard to ignore the setting of this rampage, the atmosphere. Seven years ago, as Obama was campaigning in South Carolina, the Times columnist Bob Herbert visited the state, encountering the Confederate flag flying on the grounds of the State Capitol building and, nearby, a statue of Benjamin (Pitchfork Ben) Tillman, a Reconstruction-era governor and senator, who defended white supremacy and the lynching of African-Americans, saying, “We disenfranchised as many as we could.”

“We of the South have never recognized the right of the negro to govern white men, and we never will,” Tillman said, from the floor of the U.S. Senate. “We have never believed him to be the equal of the white man, and we will not submit to his gratifying his lust on our wives and daughters without lynching him.”

The extent to which Roof was aware of the historical dimensions of his hideous act is not yet known; he is still a suspect, and we are just beginning to learn more about him. But no killer could have selected a crime scene more sacred. The Emanuel African Methodist Episcopal Church was built to be the heart of the black community in Charleston, in the early nineteenth century, as black men and women sought to form a spiritual and political refuge divorced from the oppressive white institutions all around them. One of the founders of the Emanuel A.M.E. Church was Denmark Vesey, a preacher, carpenter, and former slave who had purchased his own freedom and who, in 1822, was executed for his role in planning a slave revolt in Charleston. The broader A.M.E. and A.M.E. Zion churches were not only the spiritual home to the three men and six women Roof gunned down but to the likes of Frederick Douglass, Sojourner Truth, Eliza Ann Gardner, and Harriet Tubman.*

No small part of our outrage and grief—particularly the outrage and grief of African-Americans—is the way the Charleston murders are part of a larger picture of American life, in which black men and women, going about their day-to-day lives, have so little confidence in their own safety. One appalling event after another reinforces the sense that the country’s political and law-enforcement institutions do not extend themselves as completely or as fairly as they do for whites. In Charleston, the killer seemed intent on maximizing both the bloodshed and the symbolism that is attached to the act; the murder took place in a spiritual refuge, supposedly the safest of places. It was as if the killer wanted to underline the vulnerability of his victims, to emphasize their exposure and the racist nature of this act of terror.

Watching Obama deliver his statement Thursday about the Charleston murders, you couldn’t help but sense how submerged his emotions were, how, yet again, he was forced to slow down his own speech, careful not to utter a phrase that would, God forbid, lead him to lose his equanimity. I thought of that sentence of James Baldwin’s: “To be a Negro in this country and to be relatively conscious is to be in rage almost all of the time.” Obama’s statement also made me think of “Between the World and Me,” an extraordinary forthcoming book by Ta-Nehisi Coates, in which he writes an impassioned letter to his teen-age son—a letter both loving and full of a parent’s dread—counselling him on the history of American violence against the black body, the young African-American’s extreme vulnerability to wrongful arrest, police violence, and disproportionate incarceration.

Obama never affords himself the kind of raw honesty that you hear in the writings of Baldwin and Coates—or of Jelani Cobb and Claudia Rankine and so many others. Obama has a different job; he has different parameters. But, for all of his Presidential restraint, you could read the sadness, the anger, and the caution in his face as he stood at the podium; you could hear it in what he had to say. “I’ve had to make statements like this too many times,” he said. It was as if he could barely believe that he yet again had to find some language to do justice to this kind of violence. It seemed that he went further than usual. Above all, he insisted that mass killings, like the one in Charleston, are, in no small measure, political. This is the crucial point. These murders were not random or merely tragic; they were pointedly racist; they were political. Obama made it clear that the cynical actions of so many politicians—their refusal to cross the N.R.A. and enact strict gun laws, their unwillingness to combat racism in any way that puts votes at risk—have bloody consequences.