Because they reveal her to be a radical and not the moderate voice that we need to hear from.
Well, there must be something faulty with that line of reasoning since she is the only moderate voice from Islam that I have heard speak.
Until this thread, I had never heard of this person. Having read about her, her message would seem to be exactly what muslims need to hear.
Bear in mind, I have no use for Islam or it's "message" but at least she seems to be quite moderate and above all, peaceful.