This is not far-fetched. After all, most of CHABAD thinks its dead rebbe is the messiah and a messiah who returns from the grave is a deeply held Christian theological tenet. Boteach is simply the next step in CHABAD's inexorable march toward heterodox Christianity.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: New book by U.S. rabbi depicts Jesus as a Jewish patriot