I don't understand the issue with her anchoring the event at all.
Mackenzie clearly interpreted the decision as a provocative one, whether intentional or not. He felt that the image of a Muslim woman covertly displaying her commitment to the faith antagonised the situation. I feel the suggestion that the public are incapable of differentiating between moderate Islam and extremist Islamism, in such times, is a misled and bigoted one.
Of course there is also the interpretation of events that the fact that a Muslim came out and reported on the news (therefore subscribing to the condemning tone of western coverage at the time) is in fact a symbol of solidarity. Mackenzie chose not to see it as such, rather in a negative light which encouraged him to make racially partisan comments. He should have kept this to himself, but the fact that he did not makes him, in my opinion, guilty of racial discrimination.
Whatever your stance on Mackenzie, however, it is undeniable that this kind of alienation of moderate Muslims in our society only benefits one group: the extremists.