One Nation leader Pauline Hanson has denied responsibility for an incident in which a group of her supporters stormed a church service in an anti-Islam stunt, and compared her situation to that suffered by the Muslim community after the Lindt cafe siege.

But her anti-Islam party, which is enjoying a recent political resurgence, has warned of "civil unrest on our streets" if public concern about Islam is not addressed.

About 10 members of the Party for Freedom on Sunday disrupted the morning sermon at the Gosford Anglican Church, which is widely known for its embrace of multiculturalism and refugees. A sign at the front of the church frequently bears messages critical of Australia's hardline border protection polices.

The Party for Freedom is an anti-Islam, anti-immigration party whose Facebook page features Senator Hanson as its profile picture. The page describes her political comeback as "the greatest development in Australian politics in the past 20-odd years".