I believe the jews and Christiand do worship the same God they just have different beliefs about their God. but the Musilms no, a entirely different God,
Ro 11:26And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:Ro 11:27For this is my covenant unto them, when I shall take away their sins.Ro 11:28As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers' sakes.