Thomas Merton, a Trappist Buddhist monk, who still held to a firm belief in the now-discarded mystical tradition of Christianity (that went beyond concepts and verbalization of an experience) had a deep respect for Eastern religions, like Buddhism, where belief in this mystical tradition is still very strongly held. He was a great proponent of interfaith dialogues and had met with Buddhist leaders like HH Dalai Lama, Thich Nhat Hanh and D T Suzuki. He was also almost fanatic in his support of non-violence. Hence his love of peace(non-violence) resonated very well with the central belief of Buddhism - Peace and Harmony.
It is sad to see the contradictory nature of HH Dalai Lama who, on the one hand, visits his grave and openly shows support and great respect for a spiritual leader of another faith for his strong advocate of peace and interfaith dialogue and harmony. On the other hand, he spurns leaders within Tibetan Buddhism, like the reincarnation of his teacher, Kyabje Trijang Choktrul Rinpoche, and Gangchen Rinpoche and others, who are peacefully spreading the Dharma of Je Tsongkhapa and are devoted practitioners of Dorje Shugden, the Protector who arose to protect the Dharma of Je Tsongkhapa, the Dharma most needed by the people of this degenerate age.
Only time will reveal the true bigger picture, and show us why HH Dalai Lama is acting the way He is acting, when the ban is lifted and the truth will shine forth.