I tend to agree with Costello.
The example Costello has brought up is a good one, in my view. Sharia law and Australian common law are pretty much incompatible. It isn't an unfair expectation from the host country to expect migrants to agree with & abide by the fundamentals of our society, even if the details & nuance differ.

If a potential migrant does have an issue with the fundamental nature of the society they wish to migrant to, then perhaps they are making the wrong choice.

PS. On a totally different topic - Is it just me or is Costello doing a far better job of being a reasonable oppostion leader than the opposition leader??

=my2c