The Declaration does not found a nation. It postulates the moral basis for adhering to Government, then recites specific grievances against the British Government, including the stirring up ("excited") of domestic insurrections; and then declares the sovereign independence of the original 13 States. (But those States--or nations, if you prefer--already existed, but without sovereignty.)
As for the lack of respect between the races, that you postulate, I would cite you no less an authority than Booker T. Washington, as to the genuine respect and affection of the Negro Southerner, for the Old South--including, in particular the former Master and Mistress. Or how else do you explain: Atlanta Exposition Speech?
The tension that has been created between the races, since, did not arise spontaneously. It was achieved by generations of agitation, started not by American Negroes but by Leftist Whites, seeking a metaphor for the Class Warfare that had worked to destroy traditional cultures in other lands. (See Civil War, Reconstruction & Creating Hate In America Today.)
No one is sugar coating history. But throwing the vile refuse of the Far Left on our history, North or South, is the historic equivalent to some of the vile anti-religious pretensions to art, that have shocked sensibilities in recent years. It is no accident, that suddenly, about 130 years after slavery ended in America, it became again a hot button issue. But it is very sad to see people at a Conservative web site, taking up the contrived agitation against traditional America.
William Flax
Calling the notion that all men are created equal the vile refuse of the far left denounces one of the foremost American values. Suggesting that the Civil Rights movement was a mistake-as the article you referenced does-is contemptible. As for your other reference, where is the source? Neither of these references seem credible, you can't just give someone something that some loony wrote and expect them to take it to heart. It is very sad to see people at a conservative website denying one of the darker parts of our history, I thought that we were above and beyond that. Realize that this racism existed, realize where it came from, and its manifestations, and move on. Such denial only insenses the people that acutally suffered-and there are still some alive today.