As to the 'rebels' of 1812, you answered yourself, - they won their point.
No, maybe you missed the point. The point is that several northeastern states, who in 1861 send troops to back up their position that a state couldn't secede, felt strongly in 1814 that they had the LEGAL RIGHT to secede.
Can you please point out to me which Constitutional Amendment was passed and ratified between 1814 and 1860 that changed this fact? I know of none.
Are you that 'blind' to not be able to see the hypocrisy here, or are you just being coy?