What BEGGAR has written is 100% accurate. And it is wonderful to read that on this forum, knowledgeable ppl are participating.
What Jeff says is a great reminder to who are protector is. He is not a evil spirit that was subjugated and sworn to help dharma such as Nechung. Or fought with Guru Rinpoche and in a psychic battle lost and then forced to swear allegiance to Dharma like Ekazati the one eyed one. He incarnated into a line of great beings such as Indian Mahasiddha Birwapa, Dulzin Trakpa Gyeltsen, principal student of Tsongkapa and built Gaden Monastery. Panchen Sonam Drakpa who composed the syllabus being used today in Drepung and Gaden for the studies. Who was famed for being throne holder (Gaden Tripa) and abbot of all Gaden, Sera and Drepung in one lifetime!!! etc etc. Our Dharma protector Dorje Shugden consciously and on purpose took rebirth to arise as an uncommon Dharma Protector to uphold Tsongkapa's view on Emptiness which is supreme in Samsara. So when Dorje Shugden appears via oracle he can quote clearly from texts, debate, do divinations for future extremely accurately, give talks, pass oral transmissions and even give initiations. He is not just a protector, but Lama, yidam and protector rolled into one. Therefore if we rely on him, he blesses/guides us towards the understanding and practice of Dharma. He doesnt just take care of material necessities which is easy for him, but ACTUALLY GUIDES US TOWARD LEARNING, UNDERSTANDING AND REALIZATION OF DHARMA. Which would be the real cause for us to leave samsara and the ULTIMATE PURPOSE OF A DHARMA PROTECTOR. He 'protects' us from samsara and it's pitfalls. This is an uncommon protector who acts like a high lama when necessary. Because he is Manjushri, then we can gain attainments and great merits while propitiation of him. Finally of course as a Dharma protector to help us from the 8 fears and the results of our 8 worldly dharmas. Immensely incredible.