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Not Jewish

He is not Jewish by Jewish law, nor does he identify as one. In this interview, he clearly states that his mother was Christian, his father was a non-practicing Jew, and he himself was confirmed as an Anglican.

http://parliament.wa.gov.au/parliament/library/MPHistoricalData.nsf/bdcebf6403782d9448257cae002a1d9c/4263597ca0d0aa30c825746700071703/$FILE/Alexander,%20Ian%20Christopher,%20Oral%20History.pdf