Their "commission of inquiry" claims that the armed groups holding Shalit are "committed to the Third Geneva Convention on the treatment of prisoners of war, saying he has the proper amounts of food and was being held in a safe and clean manner that preserves his dignity."
The only problem is that the Third Geneva Conventions also specifically says in Article 125
Art. 125. Subject to the measures which the Detaining Powers may consider essential to ensure their security or to meet any other reasonable need, the representatives of religious organizations, relief societies, or any other organization assisting prisoners of war, shall receive from the said Powers, for themselves and their duly accredited agents, all necessary facilities for visiting the prisoners, for distributing relief supplies and material, from any source, intended for religious, educational or recreative purposes, and for assisting them in organizing their leisure time within the camps. Such societies or organizations may be constituted in the territory of the Detaining Power or in any other country, or they may have an international character.Hamas has never allowed any third party to visit Shalit. As far as I can tell, Hamas never specified how Red Cross visitation would compromise Hamas' security.
The Detaining Power may limit the number of societies and organizations whose delegates are allowed to carry out their activities in its territory and under its supervision, on condition, however, that such limitation shall not hinder the effective operation of adequate relief to all prisoners of war.
The special position of the International Committee of the Red Cross in this field shall be recognized and respected at all times.
As soon as relief supplies or material intended for the above-mentioned purposes are handed over to prisoners of war, or very shortly afterwards, receipts for each consignment, signed by the prisoners' representative, shall be forwarded to the relief society or organization making the shipment. At the same time, receipts for these consignments shall be supplied by the administrative authorities responsible for guarding the prisoners.
Also, Article 13 states "prisoners of war must at all times be protected, particularly against acts of violence or intimidation and against insults and public curiosity." This was violated with Hamas' parade mocking Shalit in front of thousands of Gazans in 2008.