... another Israel began to rise up again, and, at first, the new Judah seems to have been on tolerably friendly terms with it:  the two communities traded and intermarried with one another, the Samaritans took part in the religious ceremonies, and certain of their leaders occupied a court in the temple at Jerusalem.  The alliance, however, proved dangerous to the purity of the faith, for the proselytes, while they adopted Jahveh and gave Him that supreme place in their devotions which was due to "the God of the land," had by no means entirely forsworn their national superstitions, and Adrammelek, Nergal, Tartak, Anammelek, and other deities still found worshippers among them... (Passing of Empires, Maspero, 1900)