It's not a comparison, it's the "proper subset" relation: All Ts are Cs, but not all Cs are Ts.
It's not so much a matter of "proper subset" as it is an attribution of fanaticism from those who are blind to their own. The teacher referenced in this article ought to have free course in presenting his ideas regarding history, philosophy, and science, but he has absolutely no right to have his ideas go unquestioned - whether by individuals or by the community at large - if/when he presents them as anything more than reasonable conjecture.