If you feel that's ignorant, so be it. I've read that letter of Sherman's before. His autobiography has some shockingly blunt and uncomfortable comments in it as well. I don't agree at all with his view of the Federal Government as akin to a Feudal lord with God given authority. Like everyone he was a man of his times and circumstances. The curious fact is that it's today's Marxist Democrats who echo the view he expressed about Federal authority and the need to "eliminate" anyone who resists. N'est-ce pas?
Seriously? The Grant administration was considered the most corrupt in US history. Most people do not believe this to be the fault of Grant, and nor do I. I believe this is the legacy of all the corruption that Lincoln brought into the government during his tenure.
I think Lincoln set the stage for wholesale government corruption, and the "deep state" has been selling influence and government policy ever since.