My God, my friend. If you're familiar with Bensonhurst, then you should know full well what I'm talking about, in terms of Italians abandoning the city. The area is almost entirely Chinese and Middle Easterners now. Very few Italians currently exist in any of these once hugely Italian sections.
New folks come in, they become Americans there. My Aunt has Hasidim neighbors and Italian neighbors and Chinese neighbors. The two churches nearby manage to fill halls every Tuesday & Wednesday with senior citizens for bingo and most of those are Italians although all are welcome. The neighborhood changes but it remains the same, families growing up and wanting to make a better world for their children.