Yes, the law was enforced to the letter. That this is in the best interests of the children is far from evident. How can you say this with such certainty? The children don't seem to think so, and although this is not the wholly deciding factor, it is a factor. Don't you think the children's feelings should play a crucial role in deciding their best interests?
I can't be any more certain than you of which decision would ultimately be in their best interests. I'm simply saying there is no alternative under the current legislation. The law was applied to reflect the best interests of the children.
People say it shouldn't have gone down this way. I say, there was no alternative. We can't realistically ignore the Hague convention, just because these girls like Australia. Remember it was the mothers decision not to return to Italy. This was the sole reason (afaics) for the girls distress. I don't see how it could ever have been resolved peacefully, given the circumstances.