A tenant is somebody who has a lease, for example to an apartment or one of those big metal sheds for a supermarket, and by analogy, customers of something like Microsoft's "Entra ID" (what was "Azure Active Directory" at least the new name is less confusing)

A tenet is a belief or principle that you believe in absolutely, I think we'd say that this "protects but does not bind / binds but does not protect" idea isn't a tenet of Fascism but instead an observable trait.