A Sydney man who has returned from the battlefield in Syria has warned of more attacks such as the murder of police accountant Curtis Cheng and says he would voluntarily leave again if the government handed his passport back. 
The Sun-Herald can reveal that Mehmet Biber, 23, has returned from the Middle East and is living in western Sydney with his wife and one-year-old daughter.
He is one of six men who allegedly left Australia to join the terrorist group Jabhat al-Nusra in Syria in 2013. The al-Nusra Front, as it is also known, was later usurped by Islamic State.
Mr Biber is one of about 30 Australian alleged fighters believed to have returned home but only the second to be identified publicly.
On one of several Facebook profiles he has created then shut down in recent months, Mr Biber warned of more attacks such as the shooting by schoolboy Farhad Jabar in Parramatta last year.
"Let the general public know that home ground attacks such as the likes of the one we seen at parramatta will start to become more frequent as the australian government sticks its hands deeper into the blood of the muslims via joint attacks on muslims overseas," he posted.
After the Paris attacks in   November, he said: "If you attack Islam and Muslims for years on end indiscriminately then it's stupid and naive to think there won't be retaliation and consequences."
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