You are writing off one of the tenets of our belief, the essential foundation of Judaism, belief in Moshiach, and ceding it to the non-Jews, just because they profess to believe in it as well!

Would you likewise cease to observe Shabbat, family purity, tefilin, tzitzit, etc. if the Christian missionaries would embrace them as their own religious doctrines?(From a letter of the Previous Lubavitcher Rebbe)
(L'Chaim)