Your abiding pessimism about the rate of cultural assimilation in the US is misplaced. That rate is as robust as ever actually, and in some ways, moves at a pace that is more rapid than previously.
Here is a beyond the melting pot story for you. I was speaking to the Korean lady who runs the dry cleaning shop I patronize. She moved to the US when her daughter was 6. The daughter is now a lawyer working in the attorney general's office in downtown LA. She does not speak Korean. She does not eat Korean food. An Anglo who is about 50 and loves Korean food finally persuaded the daughter to go to lunch at a Korean restaurant last month.
Here is a beyond the melting pot story for you. I was speaking to the Korean lady who runs the dry cleaning shop I patronize. She moved to the US when her daughter was 6. The daughter is now a lawyer working in the attorney general's office in downtown LA. She does not speak Korean. She does not eat Korean food. An Anglo who is about 50 and loves Korean food finally persuaded the daughter to go to lunch at a Korean restaurant last month.
If you used hard data, instead of anecdotes, to form your opinions, you would have a different one.