I have long argued that those attempting to justify the war go to great efforts to cherry pick their "evidence."
According to these people, every soldier in the Union army wrote letters to back home telling their families that they joined the Union army for the sole purpose of eradicating slavery!
That is not at all the truth, but that is the sort of fact manipulation Liberals have done for centuries. They went to great efforts to collect examples of such letters, and then they try to create the illusion that this was the dominant thought in the ranks. They left out the many thousands of letters from Union soldiers that would show those fighting to eradicate slavery are a teeny tiny minority of kooks in the larger ranks.
This is form of "astroturf."
And now you are doing the flip side of that with your searching for letters from Confederates that also show what you want to believe, and ignoring the vast majority of other letters which do not show this at all.
We are long aware of how this game is played, and it does not impress us when you attempt to deceive us by cherry picking out only examples that support what you wish to believe.
When the only crop is cherries, one must pick only that.