This is as true today as it was in the Old Testament and in the first century.
The church of Jesus Christ embraces people who were Jews and people who were heathen. Until the apocalyptic dawn of the last things heathen-Christianity will typify the church of Jesus Christ. Israel was elected from the midst of heathendom. The heathen-Christians came into the church of Jesus Christ directly from heathendom. Membership in the people of God always implies a rupture with the heathen past and the heathen cultus. The relationship between heathen cultus and the church’s worship can never be defined as a transition from a preliminary stage to a crowning maturity. There is an unbridgeable gulf fixed at all levels between the heathen cultus and the church’s worship. There is nothing whatsoever to join them. They are as different as God and devil (2. Cor. 6:14–18). Therefore the conversion from heathenism to the church rightfully involves a renunciation of the devil, which as such is simultaneously a renunciation of the pagan cultus.
Peter Brunner, Worship in the Name of Jesus (St. Louis: CPH, 1968), 49.