Today, while reading Benjamin I. Huff's response to the similar claim of Craig L. Blomberg's that "Mormonism appears to relate to historic Christianity much as Christianity came to relate to Judaism: it changes enough elements to be classified better as a completely new religion," I thought that Huff's comments would be worth sharing here, as I thought they were useful and insightful regarding this topic:
It is true that in many ways Mormonism is to traditional Christianity as Christianity is to Judaism. Christianity involved different ideas, different ritual practices, and additional scriptures compared with Judaism, as does Mormonism compared with traditional Christianity. Yet Blomberg may be too quick to assume that this analogy implies that Latter-day Saint belief and practice constitute a different religion from traditional Christianity. There are difficulties with the idea that Christianity is a different religion from Judaism, however often we may talk as though it is. The distinction is nowhere near as tidy as the distinction between, say, Christianity and Buddhism.Thus Huff argues that the relationship between Christianity and Judaism (at least in the view of Christ and his early followers) is not that of a new religion, per se, but rather as a restoration of the original, with new additional revelations as well -- precisely the view the Mormons hold in regard to the connection between Mormonism and Christianity.
Christ did not offer the Jews the comforting idea that he was starting a new religion irrelevant to their own. He claimed that if they did not accept his message, they were not truly following the authorities they already accepted: Moses "wrote of me" (John 5:45& 47); "If ye were Abraham's children, ye would do the works of Abraham" (John 8:39); "it is my Father that honoureth me; of whom ye say, that he is your God: Yet ye have not known him; but I know him" (John 8:54—55). While he called for deep changes to existing Jewish practice, he persistently referred to the Jews' own scriptures to support his teachings. As we see from the Sermon on the Mount ("I am not come to destroy, but to fulfill"; Matthew 5:17), Christ did not come to replace the Jews' religion, but to correct and fulfill it.
Thus if Christ is to be believed, following their own religion required the Jews to follow Christ. Paul specifically calls the Mosaic law a "schoolmaster to bring us unto Christ" (Galatians 3:24). Designed to bring its followers to Christ and delivered by prophets who knew and wrote of him, Judaism as originally delivered was evidently a form of Christianity, although an incomplete form.
Of course, in everyday discourse it is convenient to speak of contemporary Christianity and contemporary Judaism as two different religions. They do have substantial differences in both belief and practice, and on most occasions it is not appropriate for Christians to press their view of the situation on Jews who do not recognize Christ as their Messiah. Still, from the Christian perspective, Judaism can only be regarded as independent from Christianity insofar as it is a human tradition, out of touch with its origin in revelation. Christ recognized this aspect of Judaism, calling it "the tradition of men" in contrast with "the commandment of God" (Mark 7:8). His comment on this tradition was the same as his comment on the Christianity of Joseph Smith's day. In both cases he quoted Isaiah: "This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me. But in vain do they worship me, teaching for doctrines the commandments of men" (Matthew 15:8—9, paralleling Mark 7:6—7 and quoting Isaiah 29:13; compare Joseph Smith—History 1:19).
Thus Blomberg's analogy holds rather closely, perhaps more closely than he realized. Mormonism relates to traditional Christianity much as Christ's teaching related to traditional Judaism. In both pairs, the first member claims to restore the original from which the second has strayed. Of course, Christ also presented much more than had been present in the original Mosaic teaching.
1. "Mormonism: A New Religious Tradition or Apart of Christianity?" (June 4, 2010)
2. "Problems With How Richard Abanes Addresses the Christian Question," (July 17, 2010)
3. Craig L. Blomberg, "Is Mormonism Christian?" in Francis J. Beckwith, Carl Mosser, and Paul Owen, eds., The New Mormon Challenge: Responding to the Latest Defenses of a Fast-Growing Movement (Grand Rapids, Mich.: Zondervan, 2002), pg. 324, as cited by Benjamin I. Huff, "Of Course Mormonism Is Christian," FARMS Review, Vol. 14, Iss. 1 (2002), pg. 113-130
4. Huff, "Of Course Mormonism Is Christian," FARMS Review, 14:1, pg. 113-130