Anyone who would begin an argument by pointing to the legitimacy of a non-representative puppet government created by the opposing force is either not to be taken seriously or to be scorned. Whichever you prefer doesn't matter. Your opinions appear too disingenuous to acknowledge.
Indeed, there were plenty of irregularities -- fraud and coercion -- in the secession process that people would still be arguing about today if the CSA had won.
Please avoid personal attacks. They simply convince others that you don't have actual winning arguments.