Where would you find this opinion?

[AussieMick]

Who noted that ....

When Lincoln nobly decided to receive ambassadors from the negro republics of Haiti and Liberia, he renounced from that day forward the unworthy prejudice which refuses the rights of humanity to people on account of their colour.

( To make Googling difficult I've deliberately paraphrased, only slightly, the wording. I think the basic thrust is still there though)