Do you really expect the government to reward the acts of people trying to kill the government?
I don’t think the general pardon went THAT far.
Although, I think its silly go back 160 years to give honors such as these.
Presumably you are referring to the creation of the Confederate government as "trying to kill the government" in Washington DC.
My understanding of history, and correct me if I am wrong, is that they wanted to separate from the Washington DC government, not destroy it.
It's an important distinction. Right after the First battle of Bull Run, the Confederates could have taken Washington DC, but they made no effort to do any such thing. They simply wanted to repel the invaders.