"Abraham Lincoln was NOT an abolitionist."
[David Herbert Donald, "Lincoln Reconsidered: Essays on the Civil War Era." Vintage Books, 1st Ed, 195, p.19]
He wasn't, not like the abolitionists of the times. But he did oppose slavery his for most of his life and was instrumental in getting the amendment that finally killed it passed.
Now, to be clear, does this fall under the "blood-thirsty Lincoln" category? Or the "power-mad psychopath Lincoln" category?