@farmerman,
Farmerman when one group frame another group by having their agents pretend to be from the frame group.
Real examples of a false flag operation was when the Nazis blame the Jews/Communists for the fire at the Reichstag that they likely had agents set or when they also dress dead/murder prisons as Polish solders to stage an attack on a Germen Radio Station.
Claims by nut groups that the 911 and other similar attacks are false flag operations by Israel agents to blame the poor Muslins is another example.