[1] The Australian Security Intelligence Organisation (ASIO) had been monitoring his rapid radicalisation, which took place during a period of only a few months, but had not judged him dangerous.

[6] Australian Prime Minister Tony Abbott, whom Haider had allegedly threatened during the stabbing, stated, "Obviously this indicates that there are people in our community who are capable of very extreme acts.

Professor Greg Barton of Melbourne's Monash University Global Terrorism Research Centre stated his opinion that the attack was not inspired by the message.

[1] Victoria's police commissioner stated that bag searches would mean longer queuing for the 2014 AFL Grand Final at Melbourne Cricket Ground on 27 September.

[7] The Age newspaper put a photograph of an innocent man, Abu Bakar Alam, on the front page, mistakenly identifying him as the perpetrator of the attack.