The Rafiah crossing may have been opened by Egypt but they are taking no chances with Hamas - obviously they are well aware of what it is capable of - perhaps now people will understand Israel's position after all the Hamas charter does not call for the killing of Egyptians as it does for Jews and yet Egypt is making sure it controls who comes in and who goes out and it has not allowed the commercial transportion of goods to Gaza.
See http://www.ynetnews.com/articles/0,7340,L-4076793,00.html