//In The Truth Of The Lie, Mr Amaral alleged Madeleine had died in the family's holiday apartment in Praia de Luz in the Algarve, and that her parents had simulated her abduction and hidden her body.//
I'd say they were justified in seeking damages. The right or wrong of how Maddie disappeared does not enter into it.
If they as caring and loving parents had arranged for a sitter to look after their children as was available, then Madeleine would more than likely be with them today. In my opinion damages should not have been awarded.