The R. Moshe Feinstein Eruv Opinion No One Likes Quoting

Last Saturday night I gave a class as part of the Jewish LES discussion series on the very topic of “Halakhic Ramifications of Eruv Disputes.” Most of the class was an abbreviation of my earlier three part series on eruvin in general.
The issue of eruv on the Lower East Side is particularly contentious. R. Moshe Feinstein, a preeminent decisor of Jewish Law, used to live on the Lower East Side and his son and many students of his still do so. R. Feinstein was particularly strict in prohibiting the construction on any eruv in Manhattan for reasons too complicated to discuss here, and it is allegedly out of allegiance to R. Feinstein’s position on eruv which has precluded its construction to this day.
However, R. Moshe Feinstein has another fascinating responsa regarding the opposition of eruvin in Manhattan, though in conversation it is rarely quoted by his most ardent followers. In response to the question if one ought to protest constructing eruvin in Manhattan, R. Feinstein states that while he personally cannot endorse it, one should not oppose it either since the positions allowing its construction are still legitimate. By all accounts this ought to be considered a very reasonable, respectful position and were it stated 30 years later might even be classified as “pluralistic.”
Here is the responsa in the original with my translation, for which I assume responsibility for errors.
Regarding the “Kol Korei” issue see this wonderful post form Eruv Online.