A teenage supporter of the terrorist group Islamic State, who gained notoriety after an appearance on television last week, has been arrested over an alleged religious attack on a cleaner at a western Sydney shopping centre.

In an incident that will raise fears of growing violence in Australia, the 19-year-old, who goes by the Islamic alias Abu Bakr, allegedly verbally abused, threatened and intimidated a 43-year-old cleaner at the Bankstown Central shopping centre on August 10.

Abu Bakr stormed off the set of SBS program Insight after a heated discussion with host Jenny Brockie.

He was kicked out of the centre by security but allegedly returned 1½ hours later and again abused the man, who was still cleaning.

Security again escorted Abu Bakr and a friend out of the centre and called police, who launched an investigation.