The Rebbe’s perspective on the Israeli day of Independence-Yom Hatzmaut:
In a letter addressed to an educator of a school in Kfar Chabad in the year 1955, the Rebbe answered a query regarding how the educational institution should relate to the day known as Yom Hatzmaut. The Rebbe replied as follows [in content-not exact translation]:
In truth a great miracle occurred which saved the lives of thousands of Jews, and Hashem gave the many into the hands of the few. In light of the teaching of the Baal Shem Tov that every matter a Jew hears or sees is a lesson in his service of G-d, the above events must bring a Jew to added strength in his spiritual service. Nevertheless we see that certain individuals act in the opposite way and used the above events to act contrary to G-ds will. This is a great ingratitude on their part to a most magnums level. It is similar to a king that showed his love to a simple, low class and unmannered person, and the King descended from his palace with all his ministers and brought this man into his inner chambers. Now, just imagine if this man would tell the king that in truth it is his palace and not the kings and therefore he will not respect the kings will and do as he sees fit. His first actions are to expel the king form his palace in all ways possible, through acting in a way contrary to the kings will on every manner. The meaning behind this parable and its relation to the occurrences in Israel are understood.
In a Yechidus with Rav Chaim Gutnick the Rebbe stated that the people who formed the establishment of the Sate in 1948 delayed the coming of Moshiach for 50 years. That time was an auspicious time above for the coming of Moshiach, and in place of using this auspiciousness offered to help hasten the coming of Moshiach through fulfilling G-d’s will, they debated in whether to even mention G-d in the States declaration of independence.
In a separate Yechidus with the Shlezinger brothers [of the printing press] the Rebbe verified that the words Yom Atzmaut would not be printed on the 5th of Iyar, in the calendars which Merkoz ordered on behalf of Chabad Lubavitch. There too, in the midst of a heated debate, the Rebbe stated to the brothers [who were ardent Zionists] that the people who established the state in the manner they did delayed the coming of Moshiach for tens of years.
 Igros Kodesh 11/85
Above it speaks about a yechidus with the rebbe and tou bring a source from the igros kodesh however when i looked at the sefer 11 page 85 i dont see said yechidus
The source is only for the letter. The Yechidus has been printed in Beis Moshiach etc