To all the posters who think this is about Rav Moshe using the 2.5M for Flatbush and it’s environs:
This is largely because Rav Dovid Feinstein put out such a letter almost twenty years ago. You had fifteen years to correct him. and he was the most approachable person I ever met. (He was aware of your claims. He believed that Brooklyn has the highest population of all the boroughs since he came to America. He cited the exact census data by heart. And they said not to rely on census data.) So, why are you making this into some mystery about Rav Moshe?
It is interesting to note that Rav Moshe starts off the Flatbush teshuva saying that even if Brooklyn does not have 600K and it is not a rshh”r it would still be assur. I’m wondering how you get around that. (If you say, others disagree that’s fine. If you say Rav Moshe didn’t mean it or say it, your a fraud.) Then he goes on to why it’s a rshh”r because of platya. Then he says the city map has close to 3 million living in Brooklyn, so it definitely is a rshh”r. But thanks for finding one line in the teshuva that by itself doesn’t contradict anything you posted.
Maybe you are the type of yeshiva guy who spends the whole zman on one line and thinks he knows everything.