Just silliness. I once satirically joked about personally seceding and running my own nation of pop. 1 in order to establish myself as a rich lord etc. but that was only in jest.
That there are 23 states with petitions now is just pitifully stupid. This will go away quickly.
And despite what the history books may say, the Civil War was not all about the slavery issue. There are many, many, many issues that arose between North and South over many decades of ignorance, aggression, competition and economic struggle.