What Does The Black Standard Flag Carried by ISIS Supporters And Jihadists Mean?

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The Black Standard, also known as The Black Banner, is the symbol of jihadism. Source: Supplied
The black and white flag paraded in the window of the cafe at the centre of the Martin Place siege is an Islamic flag hijacked by Muslim extremists. Known as The Black Standard, or The Black Banner, it is one of the flags flown by the prophet Muhammad but has been used by Muslim extremist organisations since the early 1990s. [link]