If I am right and get what you are implying that it was because they maybe Muslim then that would not be racial it would surely be a religious related incident then as there are white and black Muslims.
Where have I dismissed a possible racial motive ? I have just chosen not to guess if it was or not, my own private thoughts my well agree or not, you do not know. As for sexism as you describe "albeit a less damning motive" well I find that more disturbing.
Sexism is far more prevalent in the world we live in than racism, it affects approximately 50% of the worlds population therefore a real concern and I suggest a major factor why she was attacked. There maybe a possible racial element also connected and fortunately we live in a country in which...