No doubt. But they do not deserve to die for it. We should recognize that freedom of speech is "inalienable." People are born with it. The true test of whether you agree with the foundations of American philosophy is whether you might join a military in order to defend these scum their right to cheer the events of September 11th.
I'm with you. Lets test it out.
Go to any Israeli streetcorner and shout that "Sharon is a sc*mbag".
After you become the toast of the Israeli Left, go to Gaza and shout that "Arafat is a sc*mbag"
Leave address of next of kin.