It is only cool when American diplomats do it

Years ago, in the good old days when Arab diplomats used to walk out when Israeli speakers approach the podium at international events and meetings, US officials and journalists used to mock Arab diplomats and complain about their undemocratic behavior and their unwillingness to listen to the other side.  Now, US diplomats walk out when Iranian officials speak.  But American diplomats are cute when they do it, I guess.