"The West is soon approaching a critical decision, if Islam is to be quelled, a decision not unlike that experienced by Macbeth."-- from a reader 

I'm not sure that Macbeth is the figure you want to invoke (even though I understand that Lady Macbeth is now running for President). After all, there are other bits of Shakespeare to invoke, such as: "There is a tide in the affairs of men/Which taken at the flood.."). Or outside of Shakespeare, for example, that untouchable Brahmin James Russell Lowell, who provided the words to the stirring hymn: "Once to every man and nation/Comes the moment to decide/In the strife of Truth with Falsehood/For the good or evil side?"

Or how about no literary figures at all. How about just saying that common sense requires that Islam be studied as a belief-system, without tears, without taqiyya, without tu-quoque, and that knowledge acted upon in time.