What if 11 states wanted to secede are you going to impose YOUR will on them? Oh, wait that already happened.
If I was around back then and they were going to secede, but they were going to free their slaves in the process, I'd have been okay with secession. I would have voted against it, and I would have thought it was dumb as hell given their economy and lack of serious industrial capacity, and with Mexico on the border, but I would have been okay with it, assuming that the vast majority of the state supported it. I would have even stayed in Texas for a while. I would have been very concerned about England, France, Spain, and then Mexico messing around with the South.
The biggest problem is that the founding fathers were hypocrites when it came to slavery, or too fearful of upsetting southerners and didn't have the balls to carry their "All men are created equal" beliefs from the Declaration of Independence into the Constitution.
Had the slaves been freed when the United States was founded, you wouldn't have had the Democrats pushing the South into secession in order to keep their slaves.
These days, my view on secession is the same as
Rick Perry's view on secession:
I have never advocated for secession and never will.
It's one of the very few things I agree with Perry on, and I do give him credit for issuing such a strongly worded statement after the MSM tried to portray him as favoring secession.