The "demonising of Muslims" by people like Pauline Hanson is to blame for a pig's head being dumped outside the Islamic College of Brisbane's gates, the school's chairman says.
Police are investigating after CCTV showed a group of men dropping the carcass and a swastika-adorned backpack in front of the premises about 11.30pm on Tuesday.
Acting college chairman Ali Kadris said people such as the One Nation leader had incited the incident and were doing the same thing as IS by spreading propaganda.
"The shock jocks and politicians are mainstream demonising Muslims and Islam," he told AAP on Wednesday.
"If ISIS is going to do propaganda and target Muslims to make them do stupid actions, I think people like ... Pauline Hanson are doing the same thing.
"They're the same kind of hate crimes. They have to take responsibility for what they say."
Another pig's head was left outside a mosque in Holland Park in Brisbane's south about 18 months ago.
Mr Kadri said it was the first time the school had been attacked.
"For those who have done this, I don't understand why they think targeting children and women is fair game," he said.
Activist Yassmin Abdel-Magied described the incident at her old primary school as "BS".
"I remember post 9/11 we had a cop posted out the front of the school day in, day out. Just in case angry people came in to attack us," she said in a series of tweets on Wednesday.
"The cop was there to protect us ... from what?! Our neighbours? Angry xenophobes? C'mon people, these are school kids."
Ms Abdel-Magied apologised for the current state of play in Australia that meant children couldn't go to school "without being shamed and threatened".
"How is a parent supposed to explain to a kid why people hate them?" she asked.
Senator Hanson's office has been contacted by AAP for comment.
