A Sydney-based Islamic extremist has called on a Turkish audience to lead 'the armies of jihad that will conquer Europe and America' where their enemies have 'black hearts'.

Palestinian-born Ismail al-Wahwah spoke at a 'caliphate conference' in Ankara, Turkey, in early March, a video recently translated and shared by MEMRI shows.

Al-Wahwah is the leader of Australia's hardline Muslim group Hizb ut-Tahrir.

He called on the attendants to pledge 'before Allah to restore the Caliphate, to raise the banner, to restore the Sharia, to unite the Islamic nation and to lead the armies of jihad that will conquer Europe and America so that the word of Allah will reign supreme'.

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A Sydney-based Islamic extremist has called on a Turkish audience to lead 'the armies of jihad that will conquer Europe and America'

Palestinian-born Ismail al-Wahwah (pictured) spoke at a 'caliphate conference' in Ankara, Turkey, in early March. The Sydney-based hardline Islamic leader called on the attendants to lead 'the armies of jihad that will conquer Europe and America'

In his speech, al-Wahwah also warned attendants not to trust their 'enemies' in America, Europe and NATO.

'They are all enemies. Their hearts are black. They hate you, your religion, your Muhammad, and your Quran,' he said.

'Start dealing with them, before they start dealing with you. Cut of their hands before they sow corruption on the land. You in Turkey are able to do that, Allah willing.'

Around 5,000 attended the speech, Hurriyet Daily News reported.

The footage from March 6 was originally shared by Hizb ut-Tahrir, as well as Köklü Değişim magazine, which organised the conference, according to MEMRI.

MEMRI (Middle East Media Research Institute) translates Arabic content for English-speaking audiences.

Hizb ut-Tahrir has been lambasted in the past, following revelations the radicalised 15-year-old who shot dead police accountant Curtis Cheng had recently attended a lecture by the group.

In his speech, al-Wahwah also warned attendants not to trust their 'enemies' in America, Europe and NATO

The extremist group is said to reject democracy, secularism and all Western models of state

'They are all enemies. Their hearts are black. They hate you, your religion, your Muhammad, and your Quran,' he said

Al-Wahwah called on attendants to pledge 'before Allah to restore the Caliphate, to raise the banner, to restore the Sharia, to unite the Islamic nation and to lead the armies of jihad that will conquer Europe and America so that the word of Allah will reign supreme'

Farhad Jabar Khalil Mohammad reportedly listened to a talk by Hizb ut-Tahrir at Parramatta mosque in Sydney's west and changed into a black robe before he headed to the nearby NSW Police headquarters and shot Mr Cheng in the back of the head last September.

The extremist group is said to reject democracy, secularism and all Western models of state.

Al-Wahwah has previously called Jews 'the most evil creatures of Allah'.

In February this year, mosques began banning the preacher who then resorted to renting halls and private spaces, Sydney Morning Herald reported.

ASIO reportedly visited the mosque several times and caretaker Mohammed Elzamtar asked Al-Wahwah to 'tone down' his sermons.

'I felt that our community is under a lot of pressure and I didn't want him to get into trouble,' he said.

Lindt cafe shooter Man Haron Monis reportedly attended a Hizb ut-Tahrir presentation at their Lakemba headquarters on June 27, 2014, The Daily Telegraph reported.

Hizb ut-Tahrir has been lambasted in the past, following revelations the radicalised 15-year-old who shot dead police accountant Curtis Cheng had recently attended a lecture by the group