I think that's why such men as Moore, Wright and Arnold are there. I'm quite confident they'll speak of what God says in His book.
Besides, God wrote two "books," so to speak: the Book of Scripture and the Book of Nature. He is the Author of both, and --- rightly interpreted --- they will not contradict each other. Therefore there are natural reasons why a traditional, observant Taoist, Hindu or Confucianist will agree with Jews and Christians in abhorring homosexual vice. They've been around long enough to have observed that it wreaks havoc with the family and undermines the foundations of human happiness.
As I understand it, the Muslims would have, by their own choice, little to contribute to such a symposium, since they do not believe that there is such a thing as "human nature" per se: something that we all have in common. (Nor, of course, do their recognize universal human rights.) They took a philosophical turn some 1,000 years ago to assert that the only things worth knowing are in the Koran. Sola Korana.
Publishers report that more foreign-language books are translated into Spanish every year, than have been translated into Arabic since the time of Muhammad.
They just, in point of principle, are not interested in listening to what other people think, desire, value, reject, or know by experience.
There may be individual Muslims who do not fit this pattern, but they are outliers. They are the ones whose heads ISIS wants on pikes.
Muslims vote, and are encouraged to vote, as a bloc, for Democrats, for one reason only: Democrats offer absolutely no resistance to the imposition of Sharia. Muslims have no objection if non-Muslims have abortions. They don’t care what the civil law may say about abortion, or anything else, because they don’t recognize any right of any humans to make laws.