Maybe, and maybe not? But what's your point. Probably 99% of people thought that then, including many staunch abolitionists. Most also thought Irish Catholics were inferior too.
Lincoln was a politician, so it's hard to know what he really thought about "equality" of the races. But that he opposed slavery is without question. And in one of his last public pronouncements --- one that may have actually cost him his life -- he called for the right to vote for black veterans of the Union Army, and other "educated and accomplished" blacks. It has been reported that John Wilks Booth attended that speech and vowed on the spot to kill Lincoln for supporting the right of blacks to vote. Three days later, he did kill him.
And ask yourself. Why did the Democrats call him "Black Lincoln" if the guy was such a "racist"?
Excellent point!
If Lincoln was the worst bigoted beast the world, as the neo-confederate propagandists continue claiming, then he would have led the pro-slavery insurrectionists to expand slavery throughout the United States, as was attempted, and failed.