The Confederacy chose war to further their secession claims. You can't divorce one from the other.
The issue of Slavery may have motivated them to secession, but Lincoln informs us that it wasn't sufficient reason to induce them to stop fighting, in spite of his best efforts to concede the issue.
I'm not sure what you are trying to say here.
What I read, is that they fought a WAR because someone invaded them with an army.
Had the Confederacy not started the war then there would have been no reason for anyone to invade them.
They didn't CHOOSE a war. You assert that this was their intent, and that is nonsense. They were just so foolish as to believe they could attack a Union Fort without there being retaliation.
The issue of Slavery may have motivated them to secession, but Lincoln informs us that it wasn't sufficient reason to induce them to stop fighting, in spite of his best efforts to concede the issue.
I'm not sure what you are trying to say here.
If Lincoln offered them slavery, the war was not ABOUT slavery.
Had the Confederacy not started the war then there would have been no reason for anyone to invade them.
And right there you admit the war had nothing to do with slavery. The war (from the Northern side) was a retaliation. Nothing else.