The name Allah (al-ilah, "the God") has been used by Christian Arabs long before muslims employed the name.
The Aramaic word for "God" in the language of Assyrian Christians is ʼĔlāhā, or Alaha. Arabic-speakers of all Abrahamic faiths, including Christians and Jews, use the word "Allah" to mean "God". The Christian Arabs of today have no other word for "God" than "Allah". (Even the Arabic-descended Maltese language of Malta, whose population is almost entirely Roman Catholic, uses Alla for "God".) Arab Christians, for example, use the terms Allāh al-ab (الله الأب) for God the Father, Allāh al-ibn (الله الابن) for God the Son, and Allāh al-rūḥ al-quds (الله الروح القدس) for God the Holy Spirit.–Wikipedia
E.g., the muslim idea that Christians worship a Trinity of Father, Mother, and Son is a common misunderstanding among Muslims based in part on the Quran (5:119).
- Allah should be reserved for muslims in order to avoid confusion and to curb Christian proselytizing of muslims.
- Allah is not the God of Christianity.