Also, while a great symbol, Booth is an actor of some skill and... not much else. Like the entire population of the Western Confederacy is rather small and even more than that the Mississippi has been in our hands for quite some time anyways. Like, I just think that their viability is low and don't know why the British would suddenly decide to back a rump state in the midst of collapse that still believes in slavery and is sheltering and supporting a political assassin...
Now, maybe France makes some noises, but they're busy themselves fucking up in Mexico, as noted.