"If there is no check on the freedom of your words, then let your hearts be open to the freedom of our actions," with a picture of Osama bin Laden (I gather this is a quote from him), and the World Trade Towers burning in the background.
Now: Who in the West will respond appropriately? McAuliffe comes to mind.
UPDATE: Rusty Shackleford contends that the quote above refers to the Muhammad cartoons, not to Fitna. In either case, threat noted, robust response needed.