He did what had to be done.

Done to accomplish what? Secure the bond between government and industry while consolidating power to the federal government? Yeah he did...

What else would he had done?

IDK, nothing? The United States is not the world police. Not in the 1800s, not today.

When the South seceded, that was it. At that point, the US has no right to command or demand anything, because the South was no longer part of the United States. Yes, Lincoln killed people to force them back into the Union, but that doesn't mean that it was the right thing to do. I'm a pacifist, especially when a country like the US is fighting solely because it will lose money and power if the south goes.

The only time I support war is when people are fighting because all peaceful means have been exhausted, as was the case in the Civil War.

The Union would not even ENTERTAIN THE IDEA of secession. The South was left with no choice. They were fighting to leave the ass-backwards, corporate driven United States, which I applaud, just as I applaud the founders of the United States for fighting their oppressors.

you remind me of one of those people who fly confederate flags everywhere

I don't fly any flags. Flags in the usage citizens is silly in my eyes, and kind of feels like worship of government to me. Flags for the purpose of say, identifying military personel, or an aircraft or something makes sense. A dude putting a flag on his car is stupid

Also, the U.S. has only invaded other countries for that because of the effect it had on them/us.

If it's a direct threat to us, I can see it being justifiable...invading other countries over issues that have nothing to do with the United States is not only foolish, but also just plain crazy.

If I live in New York and I find out some dude in California beats his wife, do I have any moral or legal right, to go to that man's house and kill him?