Are you saying that Davis was justified in attacking Sumter?
War can never be justified, unless . . .
It is a just war.
War can be justified under the strict principles of the Declaration of Independence, e.g. consent of the governed and most likely to effect their Safety and Happiness.
War can be justified under the Constitution, e.g. if a successful regional presidential candidate were to seize control of the U.S. military and attack sovereign states in violation of the ninth and tenth amendments.
You included a pull quote in your post to me but it is not anything that I said.
So........ you are saying that Davis was justified in attacking Sumter. Thanks for playing.
That is... ahem, an interesting comment.
Can you cite the Constitution's article and section which says as much?