If all these "seizings" you mention were significant, why aren't they used as the examples instead of Fort Sumter?
How many Federal troops were killed or wounded in any of these seizings?
Also in the case of Fort Barrancas and Fort Moultrie, I happen to know you are deliberately misstating what happened, and I can only conclude if you aren't telling the truth about those two examples, your other examples are probably false or misleading too.
How many Rebel troops were killed or wounded by the appearance of the resupply fleet? Yet you claim Lincoln started the war by doing that.