The national imams council is urging Muslim leaders to do their bit to speak out against Islamic State, insisting the extremist group does not follow sharia law.

The sharia law debate was sparked last week when prominent Muslim activist Yassmin Abdel-Magied clashed with Jacqui Lambie on ABC TV's Q&A program, after the independent senator argued those countries where sharia informs the law were some of the most violently misogynistic places on earth.

The senator wants to ban anyone in support of sharia law from entering Australia.

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