My 546 ended, 'Abraham Lincoln was pro-slavery, as he supported a constitutional Amendment making slavery PERMANENT.'
The text of the Corwin Amendment did not indicate that it was permanent, Lincoln stated that in his inaugural speech:
understand a proposed amendment to the Constitution—which amendment, however, I have not seen—has passed Congress, to the effect that the Federal Government shall never interfere with the domestic institutions of the States, including that of persons held to service. To avoid misconstruction of what I have said, I depart from my purpose not to speak of particular amendments so far as to say that, holding such a provision to now be implied constitutional law, I have no objection to its being made express and irrevocable.
In other words he has no objection to an amendment which says explicitly what he already thinks ithe constitution says implicitly--that slavery is a state matter and not one for the Federal government.