QUOTE:The Embassy of the United States in Cairo condemns the continuing efforts by misguided individuals to hurt the religious feelings of Muslims – as we condemn efforts to offend believers of all religionsUNQUOTE
The mobs attack the sovreign soil of the United States, on 9/11, and the first words from the administration is to worry about the hurt feelings of Muslims.
You are technically correct; he did not use the words apologize or sorry. That does not make it any less of an apology for someone offending the Muslims. No words condemming the attack itself, or for killing Americans.