Just found this letter from Major Anderson.
I had the honor to receive by yesterdays mail the letter of the honorable Secretary of War, dated April 4, and confess that what he there states surprises me very greatly I trust that this matter will be at once put in a correct light, as a movement made now, when the South has been erroneously informed that none such will be attempted, would produce most disastrous results throughout our country. It is, of course, now too late for me to give any advice in reference to the proposed scheme of Captain Fox. I fear that its result cannot fail to be disastrous to all concerned...I ought to have been informed that this expedition was to come. Colonel Lamons remark convinced me that the idea, merely hinted at to me by Captain Fox, would not be carried out. We shall strive to do our duty, though I frankly say that my heart is not in the war which I see is to be thus commenced. That God will still avert it, and cause us to resort to pacific measures to maintain our rights, is my ardent prayer.
Major Anderson himself realizes that what Lincoln is doing is a lying backstab on a agreement/truce/understanding. He realizes that what Lincoln was doing was a deliberate act of war and he says so.
He also basically says it was a real chickensh*t thing to do.
Unionist Anderson was a pro-slavery former slave-owner from Kentucky.
He was sympathetic to the South and did not want war, though when war came he chose the Union.
Here's what's wrong with your argument:
Finally, the analogy is almost exact between Lincoln sending ships to Fort Sumter in 1861, and President Roosevelt ordering the US fleet to Pearl Harbor in 1940.
In both cases there were warnings the move could "provoke" an enemy attack, warnings the president ignored.
But we never blame FDR for the attack on Pearl Harbor, and should never blame Lincoln for the assault on Fort Sumter.