Why? Arabs were Christians for centuries before Mohammad showed up. Why should they apologize for his use of the name of God in Arabic? Whatever distortions the false prophet created are his to answer for. Arab Christians can go on praying to and baptizing in the name of Allāh al-ʼAb, Allāh al-ibn, and Allāh al-rūḥ al-quds (God the Father, God the Son, and God the Holy Ghost) without worrying a bit about that.
Al'lah (=Al Ilah = ho Theos = the God) is the word for God in Arabic. Period. Its a cognate of Elah (Aramaic), Eloh (Hebrew), Alla (Maltese).
Allah seems to have all of the attributes of Satan.
In the Mohammedan heresy, that may very well be true.
The phrase Allu akbar means Allah is GREATER. The question to ask is Allah is Greater than whom?
Allahu akhbar = God is the Greatest. The answer is the greatest of all beings that exist.
Where do you get that Arabs were “Christians” before they were Muslims?