"If modern firearms
hunters in these states are given the right to hunt with a magnifying
telescopic rifle sight (scope), then the muzzleloading hunter has the
right to use the same sighting aid during a season established for
muzzle-loaded guns.
Uh, that premise is a crock.
Muzzleloading seasons are not just for guns that load from the muzzle; they are often for guns defined by a longer list of criteria than that. There are several specifications that the gun must meet, and they vary from state to state.
I've read posts from people who carry BP revolvers as backup guns during muzzleloader season in some places. In other places, the gun must be a single shot. Double rifles must be loaded one barrel at a time. Some places require sidelock guns, others don't. Some require one of a list of specific propellants, others don't.
"No optical sights" may be an arbitrary regulation, perhaps, but no more "discriminatory" than any other specifications in the list. Perhaps allowing only hunters who can't see the game they're stalking to use scopes would work...