Counter-terrorism raids in SydneyGunman Jabar kept a low profile
"If you don't like Australia, leave it."
These are the words Parramatta Mosque chairman Neil El-Kadomi will utter when he stands before his congregation on Friday for the first time since the Sydney terror attack last week.
Mr Kadomi will deliver the sermon to more than 400 worshippers in the same mosque in which, only a week earlier, 15-year-old Farhad Jabar had cloaked himself in black before walking 500 metres down the road to shoot a NSW Police employee in the back of the head. 
He will tell those kneeling upon the tattered red carpet that enough is enough; the mosque is no place for politics, it is a place for worship. He has already changed the locks.
"We will not tolerate anyone who wants to get us into trouble," he said.
Search warrants have been executed and CCTV footage reviewed - Farhad Jabar was there on that fateful final afternoon in the school holidays. But Mr Kadomi denied the mosque has anything to do with the teenager's spiral into extremism that ended with the death of NSW Police finance worker Curtis Cheng.
"We had a spike come out of the rose," he told Fairfax Media on Thursday. "The rose is beautiful, but the spike will sting you."
"Farhad was a real wake-up call," he said. "To anyone who has crime in mind, if you come to this mosque we will tell the police."
The former teacher warned that those who did not respect Australian values would be expelled from the Islamic community in Parramatta.
"We live in this country, you must respect it," he said. "If you don't like it, leave."
Those words could just as easily have come from the leader of the anti-Islamic Party for Freedom, Nick Folkes, who has invited people to protest the mosque's existence while Mr Kadomi worships in the prayer hall.
"The high-maintenance Islamic community needs constant monitoring to prevent further terrorist attacks," he said.
A police spokesman said they had rejected Mr Folkes' application for the protest and anyone engaging in "reprisal actions or inciting violence" may be charged.
"Our message is that any act of violence, regardless of the motivation, will not be tolerated, and will be treated as the serious offence that it is," the spokesman said.
Inside the mosque, hidden behind blue neon lights and a fire escape in an apartment building in the Parramatta CBD, Mr Kadomi will urge his flock to be better monitors than Mr Folkes could hope for.
"We didn't like to spy, but now the community must be vigilant," he said.
The past week has taken its toll on Mr Kadomi. On Wednesday he lashed out at reporters, kicking at a cameramen and telling them to "f--k off".
The stress had got to him, he said. But the pressure has been building for the past 12 months.
NSW Police have visited the mosque several times since the Operation Appleby raids in   September last year, after it emerged a number of men arrested during the largest counter-terrorism raids in Australian history were linked to an extremist Street Dawah group that prayed there.
Mr Kadomi said that while groups of men had been seen hanging around the mosque, it was not his role to check on every person's political connections.
"If somebody walks into McDonald's and shoots everyone, is McDonald's blamed?," he asked.
Despite feeling under siege, he said that a tiny proportion of the Islamic community had damaged the religion's reputation.
"Ninety-nine per cent of the people in the mosque are good, educated people. We have a few who are giving us a bad name."
To prevent future tragedies he urged Islamic parents to be more involved in the activities of their children.
"Good kids can become very nasty people," he said, standing under an Islamic verse that warned believers to not be tempted by wrath.
"Too many parents say, 'My kids are very good kids,' without checking what they are up to before, during and after school."
"Know what your children are doing," he said.