I am confused too. How did they figure out she had a disability? If I am reading right, I don't think others would view allergies as a disability and protected under the ADA even though they are protected. And I am not sure people even view allergies as a disability.

I don't think they had negative intent here. I think that if you call them on it, it might make you look like a helicopter parent and "that woman" either before or after you find out about the internship. I think you would appear like "how dare you do this to my kid" no matter how you approach it.