I won't waste my energy searching for your posts, since we both know nothing will change your opinion, but stop kidding yourself that your observations have anything to do with facts. This isn't the first time you 'saw' herd immunity.
I don't know about you, but when facts change, I do change my mind. I am also open to hear opposing viewpoints and will admit if I believe I am wrong.
Have you actually been to Crown Heights or Williamsburg and actually observed what goes on, before arguing?
The fact is that most people go around without masks and do not observe any type of physical distancing, regardless of setting (indoor, crowded, singing, etc.).
Another fact is that there haven't been any COVID-19 outbreaks or spikes in these communities. Some isolated cases - yes. But an outbreak of any significant magnitude - I haven't heard of any (and I know there are those that would rush to make it known if it did exist).
Another fact is that even the staunchest of advocates of listening to the doctors, has stopped wearing a mask, and is seen mingling with crowds without a mask.
Now make all the arguments you want to, but it might be a good idea to first visit these communities and observe things first hand.