At a media conference in Brisbane on Monday, Ms Hanson advocated a ban on burqas and called for a royal commission into Islam, as well as linking the religion with terrorism and preaching hate.
Her party, One Nation, has also been pushing for the introduction of surveillance cameras in mosques.
She said many Australians were now seeing she was right when she used her maiden speech in Parliament almost two decades ago to warn of an influx of Asians.
But Race Discrimination Commissioner Dr Tim Soutphommasane has cautioned against Ms Hanson's inflammatory and provocative remarks, saying they could fuel discord within the community.
"It is concerning when we see elected political representatives appealing to xenophobia and using inflammatory rhetoric," he said.
"These are things aren't helpful to community harmony, and they're a sure recipe for hate and division."
