So your complaint is that ...etc...etc...
I have no complaints, I'm merely pointing out what I believe was the southern point of view. It really doesn't matter what you or I think now. All that matters is what they thought and did then. Obviously you and I do not agree on who started the war, and that's fine by me. I have no interest in re-fighting that tragic conflict, it can't be done.
Photo number 6 on this website shows Sumter after the rebel bombardment. As you can see the damage was considerable, and the claim that Beauregard was trying to avoid casualties is, frankly, ridiculous.
I have no complaints, I'm merely pointing out what I believe was the southern point of view.
A point of view you clearly agree with. So I would suggest that their complaints are your complaints.