Let's say that Texas passes an amendment to their state constitution that legalized pedophilia. The federal courts would step in of course and invalidate the amendment. In response let's say the state of Texas secedes from the United States to preserve their "state right" to legalized pedophilia. After Texas gets its ass kicked and is brought back into the United States should there be memorials to those that fought for Texas against the United States?
Seriously that is the moral equivalency here. Seceding from the union to preserve the institution of slavery is the moral equivalent of seceding from the union to preserve child rape. I mean what kind of people then come back and argue "well its their constitutional right to secede..."