I think you are being more hopefull than realistic.
If terrorists are a small minority of Muslims , sadly, Muslims willing to condemn them seem also to be a small minority.
Al Queda has had no problem finding hiding places , supples and money .
Perhaps there will come a time when most Muslims are ashamed of Al Quieda style political action by means of violence , but if this were already so Al Queda would have been easily eliminated .
What is demonstrated by events like the bombings in London?
Not that there is a large number of violent Muslims , but that a rather small number can be a big problem.
If you have found a "Canadian Muslim feminist, author, journalist, activist, and lesbian", what do you expect her to do?
She will have precious little credibility with Members of Al Quieda , their admirers , and those intimidated by Al Quieda , she will be neither persuasive nor a threat -Al Queida is both.