Well, if your teacher's lineage goes back to Ueshiba, it is aikido
Unless you practice Korindo Aikido or some other Aikido M.A. that does not relate itself to Ueshiba.
I doubt you could educate him. Too many people take their sensei words as fact, without ever checking them. They forget the Sensei is only human himself and may have never bothered to really study some aspects for which he did not care. Such aspects could be the history of the M.A., the nature of the various organizations, etc.