Yes, the author makes a good point. Fair is fair. The Democratic Party of the 1800’s up until the 1920’s had some shameful ideas regarding slavery and discrimination against African Americans. Although not all Democratic leaders agreed with this, there is no doubt that it existed. The Ku Klux Klan was connected to the Democrats, primarily the so-called Dixiecrats, and NOT the Republicans. The Solid South could be counted on to vote against liberal causes.
However, my conclusions are slightly different from those of the author. While it is true that the past is the past and cannot be undone (although historians are rather found of reinterpreting past events due to the emergence of new information and the application of old biases) and that what is going on now should be our primary focus, I take from Obama’s talk that NONE of us–Democrat or Republican, liberal or conservative, Christian, Jew, or Muslim–has a monopoly on ethical behavior, good will towards others, and righteousness. I think THAT is the point Obama was trying, albeit clumsily and in a poorly-worded manner, to make in his talk at the national prayer breakfast. I also believe that those who say otherwise are not focusing enough on the INTENT of the speech but rather on the distasteful “food” which was served.