"aikidō is japanese and will allways be." a shihan.
"I can teach you only a part of what I know. Because you are not Japanese. You are not able to understand." a shihan.
"You will never be able to learn aikidō because foreigners are not able to form the japanese sounds correctly." a shihan
I should add, that this is a fairly typical Japanese mentality, not restricted to Aikido or Martial Arts in particular. This mentality is often referred to as "Nihonjinron" - that Japan, and ethnically Japanese people, are "uniquely unique".
Other examples of this, is that "you can never learn to be Japanese", that "Japan is the only country with 4 seasons" (I've actually met people that told me this, with a straight face), that "Japanese people used to walk differently than the rest of the world", and so forth.
It is, frankly, silly to say the least, and is a big part of the discrimination that half-Japanese children and foreigners face in the country.
I just wanted to point out, for those who don't know, that this has nothing in particular to do with Aikido, but is more a Japanese mentality all around.