Yes, but those words were spoken by the character of Satan.
As to the rest of your argument: I don't think that any Conservatives are arguing that the subsequent felicitous circumstance of American citizenship in any way justifies the evil of erstwhile American slavery.
Regards,
Well then how about this one? "Whenever I hear any one arguing for slavery I feel a strong impulse to see it tried on him personally." - Abraham Lincoln, March 1865.
As to the rest of your argument: I don't think that any Conservatives are arguing that the subsequent felicitous circumstance of American citizenship in any way justifies the evil of erstwhile American slavery.
You mean other than John Hubbard, Walter Williams, and most of the posters on this thread? Or would you agree that anyone who believes there were benefits to slavery aren't really conservatives?