Interesting discussion and an ancient one at that, over 1,850 years old. In fact, an early church bishop, Marcion (born c. 85 AD), asserted that the
Old Testament was a scandal to the faithful and a stumbling-block to the refined and intellectual gentiles by its crudity and cruelty, and the Old
Testament had to be set aside. He accounted for it by postulating a secondary deity, a demiurgus, who was god, in a sense, but not the supreme God;
he was just, rigidly just, he had his good qualities, but he was not the good god, who was father of Jesus Christ.
Relatively little is known about Marcion (died c. 160) because his heresy was put down and his works were destroyed, or lost, or both. What is known
of his life, writings and theology are found, or founded upon, the works of his enemies: Justin Martyr (110-165), Irenaeus (120-202), Epiphanius (ca.
315-403) and especially Tertullian5 (145-220) who encountered Marcion half a century after his death. (Marcion &
Marcion's teachings were a radical departure from traditional Christianity. He came under the influence of the gnostic teacher Cedro "who believed
that the God of the Old Testament was different from the God and Father of the Lord Jesus Christ. The God of the Old Testament was unknowable; the
latter had been revealed." Marcion, by Dermot McDonald, in The History of Christianity, at 104-105. Cedro also stressed the existence of "secret
knowledge" from Jesus that had not been previously made public (a common claim among gnostics). Marcion adopted these ideas into his "heretical"
brand of Christianity.
Marcion's teachings departed from traditional Christianity in a number of ways. Most dramatically, perhaps, Marcion rejected the idea that the Old
Testament God and the New Testament God were the same being. Up until then, the traditional Church had considered the Old Testament to be sacred and
assumed that Christianity was a fulfillment or continuation of Judaism. Marcion's rejection of that idea affected many different doctrines and
Marcion faced an uphill battle with his revolutionary ideas. He faced a pretty obvious problem. For more than 100 years, Christians had been using the
Old Testament as Christian Scripture, and even the most sacred documents of Christians referred to and relied heavily on, the Old Testament. The
solution for Marcion was to completely reject the Old Testament and establish a canon that de-emphasized Christianity's Old Testament and Jewish
roots as much as possible.
Paul, with his focus on free grace, was by far Marcion's favorite Apostle. As a result, he rejected the writings attributed to all the other Apostles
and relied on forms of Luke's Gospel and ten Pauline epistles that he redacted. Although a small number of scholars have, from time to time, argued
that Marcion may have had access to earlier forms of the gospels (especially Luke), even John Knox, the most prominent promoter of this theory, admits
that Marcion intentionally and knowingly excised as much Old Testament and Jewish influence as he could find in the Paulines and Gospel of Luke.
(Marcion, the Canon, the Law, and the Historical Jesus)
Christ, so Marcion contended, came down from heaven and began teaching, proclaiming a new kingdom and deliverance from the rule of the malevolent
Demiurge. However, those who were loyal to the Demiurge crucified Christ, thus unwittingly contributing to the defeat of the former, since the death
of Christ was the price by which the God of Love purchased men from the latter’s kingdom into his own. Christ also rescued from the underworld those
who had died and who in their life-time had not been obedient to the Demiurge and thus from the standpoint of his Law were wicked. All that the Good
God asks of men if they are to escape from the rule of the Demiurge is faith in response to his love. Men have been emancipated from the legalistic
requirements of the Demiurge and of his creature Judaism. (Marcion had apparent antisemitic overtones.)
(Marcion: Portrait of a Heretic)