I turned on Fox News, some retired Colonel was going on and on about how Fallujah needed to be "cleansed" and how M al-Sadr needed to be, without exception, captured or killed. Who is to be "cleansed" in Fallujah? No one asked the Colonel about that, or anything else. One can only assume that anyone who resists the cleansing will be cleansed.
When there is actual killing going on, the term "vicious cycle" should be used carefully.