Comment on a Special Comment

Olbermann had a nice special comment verbally spanking Obama about the need for prosecutions of torturers. A couple quibbles with it, but I want to highlight one thing he said near the end of it. He talked about Lincoln and "the evils of secession and slavery". Slavery, obviously evil. But secession? How is secession evil? I'm sure someone will try to say he just meant that particular secession, but I think it was pretty clear he was referring to all secession. So, does he hate the US for seceding from the British? Ukraine for leaving the USSR? Saintly Canada? West Virginia for seceding from Virginia during the (misnamed) Civil War? What about The Czech Republic and Slovakia splitting up, who was the evil party there?