I think that as Amber says this is probably a man concerned to 'win' above all.
Really? And if your DH/Ex took your kids and vanished to the opposite side of the world....literally. Then you'd just say "oh well. It's obviously better there for them."
Of course he wants to "win". Because he wants to see his children!
I'm actually quite incredulous at some of the responses here painting this as a wrong decision.
The facts are quite simple. Mum knowingly removed the kids from their home country without permission of their father. That's not in dispute. Whether or not the Australian embassy helped is irrelevant and if true was totally wrong of them.
To allow her to stay just because the kids now want to after two years is missing the point. The courts cannot let themselves be bound by a fait accompli. If they did then many many more children are now in danger.
For example I could just take my kids tomorrow to my home country, duck & dive for a couple of years and then my ex would be screwed. That's fair yes?
We're talking Italy here, not some backwater 3rd world hellhole.