as I said, he does not address the underlying reasons for the north-south sectionalist problems in the United States in the 19th century, nor does he deal with the political environment leading up to the 1860 election.
The civil war is such a complex set of factors finally combining to split the republic up that I don’t think any candidate can get face-time to actually discuss it in any detail, if they even understand it in the first place, which almost none of them do.
it’s easy to interpret his comments, however: he thinks Lincoln was a war criminal and hates him