Lubavitch: Are they really the closest thing to Judaism?

I have several friends who are Lubavitch. Many times it seems like we follow different religions. They joke and say Lubavitch is the closest thing to Judaism. I joke and say I think it's really closer to Xianity than Judaism.

Somebody once said every joke has a kernel of truth in it.

One of the more famous Lubavitchers these days is Matisyahu. For those unfamiliar with him, he performs reggae. The question I have is, why has he collaborated with the Xian group POD to appear on their new CD "Testify"? What is it about a Xian rock group that makes it appropriate for a Jew to collaborate with them?

I can't answer it. Perhaps one of my Lubavitch friends can.

Or just maybe, Lubavitch is closer to Xianity than even I realized.