Controversial Islamic activist Uthman Badar has been banned from speaking at the University of WA after outrage over his links to ­extremist group Hizb ut-Tahrir.

The Sydney academic was barred from speaking at the Opera House in June amid community outrage at a proposed speech at the Festival of Dangerous Ideas on how honour killings were "morally justified".

Mr Badar (pictured right), the Australian spokesman for Hizb ut-Tahrir, said his speech was cancelled ­because he wouldn't "toe the secular liberal line".

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