I am well aware of all the opinions out there on the unconstitutionality of Lincoln's actions. I am also aware of all the opinions out there on the constitutionality of Lincolns actions. At the end of the day the only opinions that matter are those of the men who were sitting on the Supreme Court at the time. And crying 'unfair' and claiming judicial bias doesn't change that.
So the ONLY arbiters of what the Constitution says are 9 folks who happen to sit as judges on the USSC at any given time?
I doubt seriously that you would find much support for that idea among those who actually participated in founding this country!