That is fine and i respect your opinion. I do not share it because i think by definition what some people think normal parents "would" do does not automatically mean that all parents (or people in general) would think and do the same.
The idea of murdering someone or indeed committing any serious crime is repugnant to most normal people, but it happens every day in the Uk and around the world.
In terms of a hypothesis or a motive for concealing a body whilst the idea of the PJ's hypothesis may be repugnant to most right minded people, it is not an impossibility, far from it and should therefore, given the evidence that was uncovered during the investigation, be considered as a possibility.
You did say
you wouldn't be able to do it. I take it you are speaking as a normal loving parent.
Everything we know about the McCanns as people and parents from neighbours, relatives, friends, work colleagues, nursery staff etc etc strongly confirms that they are also normal loving parents.
Since Madeleine disappeared we also have the opinions formed of them by experts like Alan Pike, and other counsellors. These are the people who know them - or have come to know them personally, and in six years not a soul has come forward to say anything other than they are loving parents who would never knowingly do anything to harm their children.
I would rather take the word of people who know them personally - than the speculations of people who have never met them or spoken to them or ever seen them in a private capacity.
As normal loving parents, I do not believe they were capable of disposing of their beloved daughter's body.