I dont know if you understood, but what I meant was the gadol Hador (referring to Rabbi Ovadia Yosef Shlita), and why would excommunication be suggested.
About lubavitch, it cannot be denied that many of them belive that their previous DEAD Rabbi will come back to life (or actually he isn't dead, like they say), and he is the moshiah, etc. Their are many parelles between them and the followers of yeshu, and also many other false messiahs. I dont know if its all the lubavitchers, the majority or a significant amount, but their still are many who are even open about it.