Mr 'FlipFlop' Joyce believes whatever will get the most noise this week. He doesn't give a shit about religion.
Lived with his wife for years, they had two kids when suddenly it was a political priority to get the kids baptised and for the two of them to get married in a church.

I'd love for him to back this up: Find 100 first nations Australians who would agree that Australia is a Christian Nation.
Not because I don't believe there are 100 First Nations people out there who would say this, there probably are. But because it would do him a galaxy of good to actually go out and meet with 100 First Australians.