The Roman Catholic Church is the major promoter of the delusion that "Allah" is another generic name for GOD. The facts are in the comparisions of God in the Bible and the Koran. They are 2 different Gods. Therefore they cannot be the same. Case closed.
Bible translators, by using Allah for God, have created confusion. Allah is no mere linguistic designation for God, as Dios in Spanish or Dieu in French. Allah is the name of an ancient pagan idol adopted as the god of Islam; and God doesn't respond to pagan names. This can be proven by reading accounts of Baal or Molech worship in the Bible. God did not respond to those names. It doesn't matter what ancient arabs called God whether they think they are Christian or not; the facts are that God doesn't respond to pagan names.
If Allah were merely the generic Arabic word for God, then Muslims would not hesitate to use the word for God in each language into which the Koran has been translated. Instead, they insist that Allah must be used in every language. It would be blasphemy to call the muslim's god anything else.