You spoonfeed everything you hear? Here are Lincoln's original words on what you are talking about. Hardly the inflammotory remarks you make them out to be.
If as the friends of colonization hope, the present and coming generations of our countrymen shall by any means, succeed in freeing our land from the dangerous presence of slavery; and, at the same time, in restoring a captive people to their long-lost father-land, with bright prospects for the future; and this too, so gradually, that neither races nor individuals shall have suffered by the change, it will indeed be a glorious consummation."
Lincoln wasn't saying just send them back to Africa.