You are referring to his mention of “insurgent agents” in D.C. during the time of his first inaugural. Those unrecognized Southern Delegates came to negotiate the breaking up of the Union. What you are saying is that Lincoln meant in his second inaugural that he could have avoided the War if only he’d brokered dis-union with the South. You do know that he was first and foremost concerned with preserving the Union? I disagree with your interpretation of Lincoln’s words.
Concerned with preserving the money streams flowing through his backers pockets and also into the Federal treasury so that he may use it to "stimulate" more Crony Capitalism with him at the center of it.
Just like that other race obsessed Liberal lawyer from Illinois, the whole thing was about steering Federal money to "allies" and supporters.
Southern independence represented a very serious threat to the pockets of all his wealthy backers.