Which Reminds Me

Yes, due to being within earshot, I vaguely remember that I happened by chance to overhear something about how she was sad about having to assimilate with an inferior species, because all must merge into the national melting pot. Hmmm... And I cannot think of how to explain what she said. What species does she think she belongs to? And don't they all look the same to me? Well, not exactly. There may be varieties, to be sure, but anyway, I would rather not have to add my uninformed comment to the conversational melting pot because I did not quite understand what that was about.