Joseph Bowen wrote:
O Sensei's probably didn't "hate" Zen, but probably would have preferred his students to have studied Shinto or followed a religious practice similar to his own.
The quote about O`sensei hating Zen comes from Okumura Shihan so I`m sure it is accurate. The way Okumura Shihan explained it was that Zen is a "Mu" form of Buddhism whereas O`sensei`s thought was more in line with the "Yu" form of Buddhism fond in the Shingon Mikkyo sect. Also, O`sensei apparently taught that students should not follow his religious beliefs unless they truly believed them. For example, he would use the Christian Bible to explain his teachings to Westerners. To me, this is similar to the Dalai Lama discouraging Westerners from becoming Buddhists unless they really feel they must do so.