On the Rashbi’s exalted level, the inner secrets of the Torah were openly revealed; as a result, the entire concept of the churban [destruction of the Beis Hamikdash and the subsequent exile] was completely non-existent for him. It is for that reason that on his Yom Hilula (i.e., the day of his passing, when his entire divine service was perfected and completed), the recital of nacheim is utterly negated. Quite the opposite – on this day, the Redemption is greatly emphasized!
(Ibid., 5751, pp. 211-222)