Bay Ridge was always a well to do area, not working class. Ditto Dyker. Its streets were lined with mansions, dating back to before the turn of the 20th century. Diamond Jim Brady had a home there, along with Lillian Russell, and many old NY blue blood families. Many of these homes are still there. Many others were built later. It wasn't primarily Italian, even 20 years ago. German, Irish, Norwegian, Lebanese, Greek, etc. all had large presences there.

It has become a working class area recently, in the last 20 years or so, full of newer immigrants, which is the point being made.

Bensonhurst is another matter. It was always immigrants, blue collar and working class. Not the same thing as Bay Ridge.

Again, if you aren't familiar with the area, you can't understand. All of Brooklyn isn't working class, and never was. It's a large city, with very diverse areas as far as wealth goes.