I don't know this guys religion but it would be reasonable without evidence to the contrary to assume he was Muslim for reasons stated above.
Like it or not that creates an extra flag in this type of incident.
Minister Dutton is having trouble deporting people from Australia, often when he does it is overturned by the AAT. It has far more to do with politics than if someone should have a visa.
My opinion this guy has now gained an extended period in Australia while his treatment is provided until he is fit and well to stand before the AAT to appeal his visa rejection. The AAT has a far back log these days.