In an 1858 letter, Lincoln said, "I have declared a thousand times, and now repeat that, in my opinion neither the General Government, nor any other power outside of the slave states, can constitutionally or rightfully interfere with slaves or slavery where it already exists." In a Springfield, Ill., speech, he explained, "My declarations upon this subject of negro slavery may be misrepresented, but can not be misunderstood. I have said that I do not understand the Declaration (of Independence) to mean that all men were created equal in all respects." Debating with Sen. Stephen Douglas, Lincoln said, "I am not, nor ever have been, in favor of ... making voters or jurors of Negroes nor of qualifying them to hold office nor to intermarry with white people; and I will say in addition to this that there is a physical difference between the white and black races, which I believe will forever forbid the two races living together on terms of social and political equality."
You say, "His Emancipation Proclamation freed the slaves! That proves he was against slavery." Lincoln's words: "I view the matter (Emancipation Proclamation) as a practical war measure, to be decided upon according to the advantages or disadvantages it may offer to the suppression of the rebellion." He also wrote: "I will also concede that emancipation would help us in Europe, and convince them that we are incited by something more than ambition." At the time Lincoln wrote the proclamation, war was going badly for the Union. London and Paris were considering recognizing the Confederacy and considering assisting it in its war effort.