http://www.mkzc.org/apology.html
"If I may speak as an insider, however, during the 25 years of my practice under him I never saw Yasutani Roshi ever force his students to accept his political ideology. After all, it was his Dharma that we wished him to transmit to us; never have I aspired, therefore, to learn his ideological standpoint. Furthermore, Koun Yamada Roshi, who was to take over as the second patriarch, admonished Yasutani Roshi more than a few times for the latter's ideological inclination, and reminded him of the initial responsibility of concentrating upon the reviving of the pure Dharma, the intrinsic core of Buddhism. As a result, in 1967 - that is, while he was still alive - Yasutani Roshi made a radical decision to entrust Koun Yamada Roshi with the fully authorized guidance of the Sanbo-kyodan.
Koun Roshi, on his part, made it manifest that the fundamental position of the Sanbo-kyodan is to "stand at the origin point of Buddhism through the Dharma gate of Dogen Zenji," and that our aim is to attain the salvation of humanity and to contribute to establishing world peace based on the great enlightenment experience of Shakyamuni, no matter what ethnic origin, nationality, gender or creed one may represent. This resulted in sincere dialogue with Father H.M. Enomiya-Lasalle, through whose intercession a great number of priests and sisters found their way to Zen, until Zen practice outside Japan has flourished to such an extent as we witness it today. In fact, to go back to the origin point is the only way to correct past wrongdoings and to truly contribute to the peace of the human world. "
"On this occasion, the Sanbo-kyodan solemnly vows never to lose the origin point of Shakyamuni and to follow persistently and energetically the path of realizing the essence of our self in this world of phenomena through our zazen practice. "
Buddhists may have political stance, but will *never* put Buddhism in the name of it. The Communist in China did prevent the development of the nation, many people suffered under its rule, comparable to communist North Korea during its time. The Communist even treatened the Buddhist monks, and they were forced to Taiwan (including my own Buddhist Master). These communists removed all religions including Buddhism from the nation, fearing a uprising from "seperatists", portraying religion as "evil" and is known to spread propaganda well. It is only until recently that China is more "open" to everything, economic, religion, etc, and sees a rise to the glorious Chinese past. I feel that China should have done this long ago.
However I believe what the Zen masters did not know, is that the Japanese's motive is not to remove the communist leadership, but to conquer the whole asia, and it goes beyond China - into the South East Asia, killing lots of innocents in China and SEA (my grandfather died indirectly due to the Japanese).
Zen masters did not order the killing, they are probably making their own personal comments, and will never ever say it in name of Buddhism, and I think it is a mistake they made.