Australian Prime Minister Malcolm Turnbull said we should grieve and we should be angry, but must not let that cloud our judgement in the fight against Islamic State.

LISTEN ABOVE: Leah Farrall, Counter terrorism expert from Massey University joins Larry Williams to discuss Turnbull's speech

He's been addressing the Australian parliament on national security issues.

He said this is not a time for macho gestures.

"Calm, clinical, professional, effective, that's how we defeat this menace. The threat from ISIL is a global problem that should be addressed at its source, in the Middle East."

Turnbull has told the the Australian Parliament the terror group is in a fundamentally weak position.

He said it's ideology is archaic.

"But its use of the internet is very modern, ISIL has many more smartphones than guns, many more Twitter accounts than soldiers. It does not command broad base legitimacy, even in those areas under its direct control."