Hi ir.
Thank you for addressing that. Most of what I needed to know on the subject I got from the book, The Real Messiah, by Rabbi Aryeh Kaplan.
I would be very surprised if Shmuely Boteach would reach so far as to hold to views of embracing yushke.
While he is not on my list of concerns, I did have a pleasant view of him and how he brought out his Jewishness in his public persona and career.