The cause for Deutsch's break from Chabad is also attributed to a biography he wrote covering the early life of Rabbi Menachem Mendel Schneerson, the Seventh Rebbe of Chabad.
Deutsch's separation from Chabad is attributed not only to his writing a biography about Rabbi Menachem Mendel Schneerson's youth but also to the fact that this biography covered the early life of the Seventh Rebbe of Chabad.