Who is Hasan Piker – and why are some Australian conservatives outraged about his return to the ABC?

The leftwing commentator has been invited to appear on the Planet America program on Monday night

The ABC is set to air the return of its Planet America program on Monday night as the US midterm elections gain steam, with a new episode featuring the leftwing commentator Hasan Piker.

Host John Barron said the episode will focus on the rise of Democratic socialists and the populist left", with Piker speaking about what it's like in the eye of a political storm". But the appearance quickly sparked the ire of conservatives in Australia.