Waterloo and Richmand

I saw in State Rights the only availing check upon the absolutism of the sovereign will, and secession filled me with hope, not as the destruction but as the redemption of Democracy.
... and I mourn for the stake which was lost at Richmond more deeply than I rejoice over that which was saved at Waterloo.

Lord John Acton (1866, In a Letter to Robert E Lee)

Equality

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. ... and I will say in addition to this that there is a physical difference between the white and black races which I believe will ever forbid the two races living together on terms of social and political equality. ... And inasmuch as they cannot so live, while they do remain together there must be the position of superior and inferior, and I as much as any other man am in favor of having the superior position assigned to the white race.

Abraham Lincoln - Fourth Lincoln-Douglas Debate (18 September 1858)

Genocide and Extermination of Civilians

[W]e must . . . never forget, we must put in the dock and hang higher than Haman, those who, in modern times, opened the Pandora’s Box of genocide and the extermination of civilians: Sherman, Grant, and Lincoln.

Murray Rothbard given in a 1994 speech titled “America’s Two Just Wars: 1775 and 1861"