"Expressing opinion, freedom to protest and announcing positions is guaranteed, but without assaulting private or public property, diplomatic missions or embassies," said Mursi
"I affirmed to him the need for deterrent legal measures against those who want to damage relations between peoples, and particularly between the people of Egypt and the people of America," he said.
"In another statement, Mursi said he expects "assurances from the U.S. government to prevent any infringement on the sacred"."
President Mursi is wrong to expect or even ask for "assurances from the U.S. government to prevent any infringement on" what he considers " the sacred."
With few exceptions, the US Constitution forbids the US government from infringing upon free speech and expression. The US government is not supposed to (it doesn't always do what it is supposed to do) compel people to respect Islam or Mohammed or Christianity or Jesus Christ or any other religion or religious figure or any ideology or historical figure for that matter. The reason for that is to protect the Muslims' right to openly be Islamic, to openly proselytize, and to openly revere Mohammed while also doing the same for Christians and members of other religions.
Without such guarantees, it's certain that Islam would not have been tolerated in the US. It's that simple.