In addition to the fact that it’s ridiculous to say that because the Rebbe requested his approval, the Rebbe therefore stands behind whatever he says, is should be noted, that the Rav Frank wrote a letter almost five years later, due to the strong request of Rabbi Kasher (one of the Rabbis involved in the institution of the Manhattan Eruv). It is therefore unclear what the contents of the letter have anything to do with with what the Rebbe wanted from him.

However this is a total falsehood. Rabbi Eisenstat writes explicitly, that he is NOT relying on the ocean, and he is only relying on the built up walls that existed at the time around Manhattan. This was the written in the very Kuntres which the Rebbe wrote his comments on.

In any case, this is immaterial, because by their own admission, the Rebbe did not approve of the usage of this Eruv, and therefore it is clear that the new letters have nothing to do with a supposed Mitzva to make usage of the Eruv, and are immaterial to a discussion if the Rebbe wanted to institute Eruvin so that people should make use of it.

Rabbi Eisenstat met the Rebbe in person to discuss it with him.

The Rebbe later wrote to Rabbi Moskowitz (another Rabbi who was involved in the Manhattan Eruv), that he told Rabbi Eisenstat, that it is a great Zchus to make the Eruv, but only if it is done in secrecy.

The Rebbe wrote the same thing to Rabbi Moskowitz a few years later, about the very same Eruv, that it is a great Zchus, but only when done in total secrecy, and on the contrary if it is not done in secrecy it would be terrible.

This is crucial context which has been left out by those who publicized the new letters.

This is the very Eruv which the Rebbe wrote about in the new letters, in they want to use to promote Eruvin

However one should add, that the Rebbe would never has a position in opposition to the Frierdiker Rebbe. The Frierdiker Rebbe wrote that he was not Maskim to the usage of this Eruv, obviously the Rebbe was not turning around and say, hey let’s scratch that.

דברי צדיקים קיימים לעד, and one can see how those words apply to our present day, the same way it applied then.