Answering a question about the economic boycott of Israeli and American goods the Religious Authority Sayyed M.H. Fadlullah issued the following Fatwa:

All American and Israeli goods and products should be boycotted in a way that undermines American and Israeli interests so as to act as deterrence to their war against Muslims and Islam that is being waged under the pretense of fighting terrorism. 

This boycott should become an overwhelming trend that makes these two states feel that their economies are in a real and actual danger.