Agreed, there's a fine line between free speech and screaming fire, but the lines need to be defined.
IMO, under the present circumstances, some of the U.K. muslim clerics have gone beyond free speech, are guilty of sedition and should be tried in a court of law.
As I see it, if the U.K. were NOT part of the coalition forces in Iraq, and if the U.K. was NOT under the threat of terrorist acts on their terra firma, the U.K. Muslim clerics could pick and choose who they wanted to support under the laws of free speech.