If the McCanns did not decide to leave their children unattended, Maddie would not be missing right now. But yeah, blame the Portuguese people.
The thing is Martina, yes the McCann's were wrong leaving the children by themselves, but they still deserve a proper investigation by the Portuguese police. Why wasn't Mrs. Fenn interviewed straight away she would have been able to tell him that she had an intruder who entered and exited via the window, she wasn't, why wasn't 5a made a crime scene immediately it wasn't, why wasn't the bedding sent off to pathology they weren't, why weren't there road blocks straight away when the child wasn't found, why did the police arrive so late the following day with the dogs, Amaral dismissed the idea that 5a could have been broken into 'there was no evidence' he said, but why didn't he pursue the idea there might have been a copy of the front door key? did he look into that? He must have known about the burglaries that had been going on and the sex attacks on children. Amaral says he suspected the McCann's straight away, though he didn't make 5a a crime scene, he cancelled the reconstruction because he was worried about tourists.
Madeleine deserved to have a thorough investigation but she didn't.