How can you say that Chabad does not believe in Jewish nationalism when Judaism is the essence of Jewish nationalism? The State of Israel does not have to have a King to be a Jewish State. See Ibn Ezra.
Examine the difference between the first tablets engraved with the word freedom and the second tablets. The three oaths written in Shiur Hashirim end with the word until HaShem desires. Only Hashem can make Israel into a free state and not the Rabbanim just like only the Chassidim can make the life of the Rebbe to continue forever.