Many non-Muslims have come to incorrectly believe that Allah is the ‘God of Muslims’ – A deity somehow different from the God of the other faiths. It should be emphasised that the term “Allah” has no implied meaning at all of an Arabian god, a Moon god or even a Muslim god. Muslims are not claiming any exclusiveness when they say "Allah". However Allah is simply the Arabic Name of the one Almighty God; the same name by which Arabic-speaking Jews and Christians, refer to God. The Allah comes from the term ‘al-ilaah’. Al is the definite article in Arabic, equivalent to ‘the’ in English, while ilaah means ‘a deity or god’. So Allah means The God. This is beautifully articulated in the first pillar of Islam which is to believe that God is One, in Arabic it would be, "La ilaha illallah" meaning "There is no god but God"
No. Together with Judaism, they go back to the prophet and patriarch Abraham, and their three Prophets are directly descended from his sons - Muhammad from the eldest, Ismael, and Moses and Jesus from Isaac. Abraham established the settlement which today is the city of Makkah, and built the Ka'bah towards which all Muslims turn when they pray.
