Dear You dont,
What is the point of being evasive? Whatever your shittah is, you should own it. And say ‘I don’t know’ or ‘I can’t explain that’.
I will take the liberty of responding directly on your behalf.
1) Rav Moshe wrote something completely new, and we are left wondering if it is a new opinion or an omission from his first letter. Even though he writes that it is all explained at length in his teshuva, we see a new idea in the Flatbush letter of three million.
2) There can not be any teshuva that is about Brooklyn as then Rav Moshe could be accused of issuing a psak din barrur. Rav Moshe in 4:87 writes that he is compelled to respond with his opinion because he writes stuff about his own thinking. These lines are to be ignored.
3) The understanding of the topic is not important. It’s all about what could we get away with in spite of Rav Moshe’s well publicized, thoroughly printed, and until recently, testified by many great chachamim. Anybody who points to Rav Moshe’s opinion, and doesn’t admit that it can be manipulated, must be ignorant.
4) Rav Moshe doesn’t pasken against other rabbanim. (Except for thousands of instances that are convenient to ignore.) And if one follows those rabbanim he can still not be in contradiction to Rav Moshe’s opinion. Even though Rav Moshe told them not to build an eruv. Because what he actually said and thought should not be considered when reading his writings.
Okay, that is what I think you are trying to argue. You don’t get that I am trying to give you a chance to talk. I could crush every one of your mistakes with a dozen responses. But then you come with a bunch more incoherence. Admittedly, this is not a topic I know well. But you are so tripped up, I can’t help myself. You fell into every net I put out. You are completely oblivious to how the eruv battle aligned with the attack on Orthodoxy. You don’t even know ten percent of the eruv story. And whatever you do know that I don’t you do not want to share. This isn’t a machlokes leshem shamayim on your part.