people have dangerous prejudice against other nationalities, races and what not and building their own identity or the familys identity on something that then later show is not the entire "truth".
I personally think it is great - good to have prejudice torn down.
We're all human and that is the greatest truth of all :)
If they are giving her a hard time about it - they should look themselves in the mirror and let her be. I truly hope she will recover and be well from her depression. If she has spot a vulnerability-match for her depression in her reseach then maybe that too could be what she meant?