The Morrison government has banned Milo Yiannopoulos from entering Australia after the controversial right-wing commentator responded to the New Zealand mosque massacre by describing Islam as a "barbaric" and "alien" religious culture.

The ban will be the third position the government has held in as many weeks on whether to allow the controversial figure to travel to Australia for a speaking tour later this year.

Milo Yiannopoulos. Credit:Alex Ellinghausen

In early March, senior Coalition figures supported a preliminary Department of Home Affairs plan to deny Mr Yiannopoulos a visa, before backflipping three days later amid a backlash from some Liberal Party MPs and conservative media outlets.

That decision was reviewed on Saturday morning following Friday's terrorist attack at two mosques in the New Zealand city of Christchurch.