Does a State have the right to secede?

[Rob Wick]

If the right of secession, protected as it is by the Ninth and Tenth Amendments, is inalienable

That it is only a matter of personal opinion, and not one shared by the Supreme Court in 1869. How exactly does someone have an inalienable right to destroy a country? Isn't that treason, given that it's doubtful the country would allow itself to be destroyed, especially since there is no express mechanism for it's destruction listed in its founding documents? And given that treason is the only offense specifically defined in the Constitution, isn't that prima facie evidence that the founders wanted to make sure that treason never went unpunished?

Best
Rob