I read the rebuttal and am not so impressed.
There are many other sources about Lincolns words and deeds, so I don’t thin the author of “The Real Lincoln” took things out of context.
The largest open question was “Did Southern States have the right to leave the Union”. Legally, I think it is impossible to answer anyway but “yes” without going into contortions like 2nd Ammendment deniers do.
From his original sin of thinking he had the right to force sovereign states that were in a voluntary union to stay in that union when the no longer wanted to — all the other sins follow.
Please add me to your Civil War II ping list.