Chris Smith speaks with Professor Greg Barton about a rise in Islamic extremism heading to Christmas. Twelve people have been killed in an attack at a Berlin Christmas market, while protestors in Lakemba were calling for global Islamic rule.

<p>Chris Smith speaks with Professor Greg Barton about a rise in Islamic extremism heading to Christmas. Twelve people have been killed in an attack at a Berlin Christmas market, while protestors in Lakemba were calling for global Islamic rule.</p>

The Alan Jones Breakfast show: Highlights

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