In summary, then, (1) the other state legislatures understood Madison in 1798 as saying precisely what Madison later tried to deny he had said; (2) Madison did not correct this alleged misunderstanding when he had the chance to in the Report of 1800 or at any other time during those years; and (3) the text of the Virginia Resolutions clearly indicates that each state was “duty bound” to maintain its constitutional liberties within its “respective” territory, and hence Madison did indeed contemplate action by a single state (rather than by all the states jointly), as supporters and opponents alike took him to be saying at the time.
Madison and Jefferson made statements on the subject of state governments judging the constitutionality of federal law and executive application. Later, these were used in the arguments of secessionists, which Madison countered by pointing out that nullification has nothing to do with secession. That whole post of yours was without substance.

I find that any argument given for the illegality of secession is an argument for the use of main force against secessionists.
So you admit that secessionists make themselves as renegades against mankind?

Conformist anti self governmentist are loath to admit that there is no cake for them.
It's dirty work, but the law demands it.