A more reasoned response to Cardinal Dolan's Speech:
William Kilpatrick responded to this speech for The Catholic-Muslim Faith Alliance in the following page at their website:
We will quote one paragraph here, to summarize Mr. Kilpatrick's best argument:
"Once we move from the general to the particular, the “same God” thesis begins to fall apart.
In the New Testament, God presents Himself as a Trinity (Mt. 28:19); in the Koran, God explicitly denies being a Trinity (5:73).
In the Gospels, God refers to Jesus as “my beloved Son” (Mt. 3:17); in the Koran, God curses Christians for calling Christ the Son of God (9:30).
In the Christian account, God accepts His only Son’s sacrificial death on the cross; in the Muslim account, God declares reports of Christ’s crucifixion to be “a monstrous falsehood” (4:157).
In light of these significant differences, it is difficult to see how the God of the Bible and the God of the Koran could be one and the same."
I would also encourage you to read Mr. Kilpatrick's sections on 'Honor Killings', multiple wives, wives and children as possessions, and lowering the legal age of Marriage in Iran,from 13 to 9, because 13 is 'Un-Islamic'.
William Kilpatrick taught for many years at Boston Collage, and is the author of many books, most recently, Christianity, Islam, and Atheism.