The south did prepare to murder Lincoln. They knew as a western man they could not capture him, but could only kill him. The slave power through its agents in the Department of War created disloyal militia companies so that they could begin the insurrection in the District of Columbia. After Floyd resigned as Buchanan’s secretary of War, loyal officers went around to militia companies in the District of Columbia, and inspected them. As part of the inspection, their officers were required to swear an oath of loyalty to the US government in front of their men. Where militia officers refused, the militia company was disbanded, and the US government owned weapons available to the militia to assist their drill were impounded. Eventually those weapons were distributed to militia companies that were loyal.
It was only because of those loyal militia companies that Lincoln was able to be inaugurated.
It was only because the disloyal officers depended on deluding the members of their militia companies that the approach worked. Once their disloyalty was revealed, their plan for insurrection would not work.
God had no part in those actions, right?