Nonsense.
The Confederate military assault on Fort Sumter was equivalent in its day to the Japanese attack on Pearl Harbor, or today to a possible Cuban assault on US forces at Guantanamo Bay.
They were not just provocations of war, they were the actual start of war.
Whatever their reasons might have been, Confederate actions were acts of war, period.
Firing on Sumter wasn’t a sneak attack.
Lincoln was well aware of the previous attack on the Star of the West and knew he was provoking a similar response.