Actually, if you read the article closely, what is said is " However, no other deity, other than Allah, was referenced in the show." Since Allah was the only deity name used, then the school district made a reasonable decision in removing that divine reference as well, giving none preference.
Also, the Koran contains extensive writings on Christians, the Jews and the Bible, even retelling some of the same stories. Considering that Mohammed claims to have been of the Line of Abraham, through his son Ishmael, and since the he also taught that the God of Abraham is the one true God, the God he worships, then it is the same as the God of Abraham, Isaac, Jacob and the God made flesh in Jesus Christ, though Muhammad denies that.