That is a complex conundrum DDan; The question in reply would be to ( Self Appointed ) “Ayatollah Boroujerdi” What Islam does he follow, I mean Sunni sect or Shiah sect- Wohabbi – Hezbollah- Pakistani- Veriant-Asias variant-Islamic Brotherhood sect or any of Islam’s pandemic sects. Or even our great Irfans Pan Tibetan Islamic Buddhists sect. hmmmm.
Islam is not a foundation based on religious connotations and monotheism, although expounding the virtues of such doctrine; it is based on the primordial thesis of Egoism and Totalitarian Governance through the eyes of certain fallen Angels in theosophy.
I bet any money even the Ayatollah Boroujerdi ego has overtaken him, so far as he has not got a clue what he is talking about ether.

I would doubt any crazy minded leftoid Mathematician could fabricate the figures beyond reprieve to explain that; The Islamic conundrum; but it is not as hard as some make out, and most certainly is not that complicated.
The Intellectualized version was created about the 16th century, and refined in the late 18th century. OOO no not Islam, Communism and Fascism ; the other pantheon of totalitarian doctrines based from Islams philosophical principles; for the infidel/ Dissident.

Hi All thanks , nice comment but I haven't got the answer yet.
Hi runner BOAZ_David and mickijo would you please answer the question.
Thanks everybody for your time and comments.

My answer would be that if Mr Costello ventured an opinion, he has the right to do so and no Ayatollah,priest, lama or Donald Duck should say that he has no right.
Although saying that puts me in the position of denying the Ayatollah's right to free speech too.
Whether Mr Costello is correct or incorrect, are we going to have the Islamic world once more in an uproar over some perceived slight?
The Islamic world says some pretty awful things about the West but that is their right and we do not throw any hissy fits because they have said it.
This is my answer.

Hi mickijo , Thanks for your time. so you are trying to say: No Ayatollah or any Muslim person can say his/her opinion about Mr. Costello's speech whether Mr. Costello is correct ot not, because we don't want Islam in Australia, and it doesnt matter if we don't give right to that Muslim person to have free speech.
Is that what you said? Have I understood your answer?

I think we are going around in circles here. Ayotallahs, treasurers ,prime ministers, hoi polloi, donald duck all have a perfect right--IN THIS COUNTRY--to say what they like.
What is wrong is when anyone critisises, not the content, but the persons right to say whatever they said.
We also have the right to say the content of the speech is wrong eg when the Muslim Imams say that Australian girls ask to be raped because of their clothing.But we must not say the imam has no right to speech.
That is what I was referring to.

mickijo If I am not educated and I dont know anything about history but I apply a job to be a teacher to teach students the Australian history, my application will be rejected. By rejecting my application they try to tell me: "you have no right to teach students."
so the main question in this discussion was this: "Can a person who has not studied Sharia law and is not expert of Islam teach muslims about model Islamic system?"