Allah is Arabic for God or god and depending on what deity is under discussion can refer to the one true God or any multitude of false gods. For Arabic Christians Allah is equivalent to "elohiym", which is an irregular nown that can be both singular and plural.
Now, since you converted to Islam and claim to have a good knowledge of the Bible and the Qur'an perhaps you can address why the Muslims who come to this board maintain that the Bible has been corrupted. If you are not willing to address this topic then I am not interested in another harangue from a Muslim who ignores the Qur'an and what it states concerning the Book of the People of the Book. Also I will not engage in another debate with a Muslim who takes portions of the Bible out of context. Therefore, if you try to pull this tactic this thread will be locked.
As to Muhammad, in my opinion he was nothing but a sex crazed opportunist who took the concept of oneness plus traditions from Catholicism and incorporated portions of the moon-god to develop what became known as Islam.