If you can establish that this was done at the direction of the Confederate government, then you may have a point. However, I think it was done by a bunch of individual hot heads who were unconnected with the official Confederate government.
Yes, I'm aware of the Pinkerton team rescuing Lincoln from that assassination attempt, but I have never heard that the Confederate government was in any way involved.
750,000 Americans would eventually die because Lincoln became President.
There was no government of the confederacy that day.
Buchannon wasn’t going to prosecute a war after the election of Lincoln. The south was directing actions at the president-elect who they feared would bring in free states in the territories and not match 1 for 1 with new slave states.
i merely believe trying to assassinate the president elect was an actor war by people loyal to the confederacy and in a city that was also pro-south. In the book you can see who the conspirators were and the power and influence they had.