That source is wrong. He was not sent there to party, certainly, but he was not ordered by the Confederate government to fire on Ft. Sumter. The Confederacy at the time had sent reps to Lincoln to talk peace. Lincoln loved the attack. He got his war.
However, he was treated as a hero, not as someone who disrupted the government’s plans.
It is difficult to believe the Confederate government had a strong dislike for his actions.
At the time, the Confederates were sure they could win a war with the North. They also believed England would come in on their side.
Both assumptions proved to be mistaken.
A common cause of war is when one or both sides believe they can easily win.
His hero treatment did not last long beyond the Civil War.
In wartime, when a government is trying to whip up support for the war, it would not make sense for the government to tell the citizeny that the war was started without its approval.
For the same reason, you will notice that democrats, except for Fetterman lately, never criticize fellow democrats, putting up an united front. Republicans aren’t quite that intelligent.