These lengthy rhetorical bouts tested the endurance of the audiences and the candidates. Rather than inspiring memorable words, they proved for the most part an embarrassment. The encounters were brutally sarcastic, featuring highly personal attacks rather than elevated discourse.
In his view, Holzer sees that the "bigotry" and "racism" of the both participants should also give use pause as well:
Still, no friendly editing could disguise the debaters’ shortcomings, including their open prejudice. Both men used the N-word — a term that, even then, shocked some. Douglas, who voiced horror at the sight of African American leader Frederick Douglass riding around town in a carriage driven by a white man, maintained that American democracy was created only “for the benefit of white men and their posterity forever.” While Lincoln insisted that the Declaration of Independence applied to all, he also descended into bigotry, acknowledging the “physical difference” between whites and blacks. In the fourth debate, he went further.
“I am not, nor ever have been, in favor of bringing about in any way the social and political equality of the white and black races,” he declared in Charleston, Ill., to robust cheers, “nor ever have been in favor of making voters of the negroes, or jurors, or qualifying them to hold office, or having them to marry with white people.” It was not the future emancipator’s finest hour.
This is really bad analysis and completely misses the whole point of what Lincoln at that time was trying to achieve. Ken Thomas at No Left Turns rightly calls Holzer's Lincoln credentials into question in this statement:
This is mediocre historian shallowness, which ignores what Lincoln might do in the future--shown clearly by the Emancipation Proclamation, his allowing blacks to fight in the Union army, and his early policies for reintegrating the South. Lincoln had no reason to speak of such civil and political equality, when most blacks were slaves. This superficiality breeds ignorant Lincoln haters and other cyncial leftists who despise their country. Though Holzer describes well the excitement of the debates, he, like most historians, simply doesn't see the principles involved. Ultimately, he does not understand the subjects as they understood themselves.
And here is Harry Jaffa in A New Birth of Freedom--the best book ever written on Lincoln--on Lincoln's supposed racism and bigotry:
Throughout the slavery controversy, Lincoln is careful to avoid contesting the question of the equality or inequality of the races “in the gifts of nature.” Given the overwhelming prejudices of white America, North as well as South, it would have been senseless for him to do otherwise. He is at great pains, however, to argue that this question is irrelevant to the question of the justice or injustice of slavery. To have contended for anything more than freedom would only have endangered whatever prospects for freedom there might have been. Yet careful analysis of Lincoln’s many references to the intelligence or abilities of Negroes shows amazingly little actual concession to the prejudices of his contemporaries, even while seeming not to contradict them. . .
Lincoln’s characteristic expression was, “Certainly the negro is not our equal in color—perhaps not in many other respects.” The only inequality that was “certain,” according to Lincoln, was color. Only the prejudices of his audiences would find such a judgment of Negro inferiority in such an assertion. Yet Lincoln would continue, in a phrase that, with minor variations, he repeated endlessly: “still, in the right to put into his mouth the bread that his own hands have earned, he is the equal of every other man, white or black.” The contrast between the ambiguity of what Lincoln says about Negro inequality and the unambigiuousness of what he says about Negro equality is striking.
Holzer displays one the great pitfalls of modern education: the belief that we can understand those in the past better than they understood themselves. Holzer completely misses the prudence and judgement in Lincoln's actions and condemns him for things for which he did in a just manner.