It's not nearly as believable as Narnia or Never-Never Land. You don't even have to know any real law or history to notice that it's self-contradictory nonsense. The deeper allure of Constitutionalism is that it purports to be, not only history which explains, but technique which controls. Resentful and suspicious, Constitutionalists are certain that conniving judges, legislators and lawyers switched their own false law for the real law when the people weren't looking. Unfortunately, Constitutionalist words don't do anything but lose court cases and invite sanctions.
Constitutionalism is the white man's version of the Ghost Dance.
But believing you are invulnerable to bullets puts you in more, not less, danger of being shot. These are, if in no better repair than the rest of the ruins, at least of respectable antiquity. Even if Constitutionalists were juridical Jack Kennedys and not, as they are, Dan Quayles, the conditions for getting away with pious lying about these parts of the past no longer obtain. Good history does not necessarily overthrow legal orthodoxy, but by now bad history never does. So unprincipled are judges and lawyers that they will even tell the truth if it serves their purposes.