His, and his followers' beliefs were very similar to MAD beliefs, but the early church condemned this wrong view as heretical.
Nang claims that those who opposed Marcion were the early “church”.
The main objections from these early “church” critics (according to the link she endorses) were:
1. Marcion teaches salvation by faith apart from works
“Most Protestants are utterly unaware that Paulinism, in particular faith alone doctrine, previously threatened to overwhelm Jesus’ salvation doctrine and destroy it.”
“The Jerusalem church’s response is directly reflected in our New Testament. As Augustine noted in 413 A.D. in his treatise Faith and Works, the epistles of James (the first bishop of Jerusalem), Jude (the second bishop of Jerusalem), and Second Peter were specifically written to destroy “faith alone” doctrine as inferred from Paul’s epistles.
“Tertullian in rebuttal to Marcion conceded that the ceremonial law of the old testament was abrogated, but the moral commandments in the Law remained. To this end, Ter*tullian taught repentance and obedience remained absolutely essential to salvation.”
2. Paul is a false prophet – the apostle of heretics; an apostate
“A prominent leader of early orthodox Christianity was Tertullian. In 207 A.D. Tertullian in Against Marcion rebutted Marcion by attacking Paul. He questioned whether Paul was an apostle of Jesus Christ, saying a self-serving claim, as Paul made of being an apostle of Jesus, does not suffice. Tertullian suggested Paul was a false prophet. He also called Paul the "apostle of the heretics."
“The Jerusalem church previously replied to anti-Law and faith-alone doctrine by saying Paul was an apostate and did not represent true Christianity.
As Professor James Dunn notes: “The most direct heirs of the Jewish-Christian group*ings within earliest Christianity [i.e., the early Jerusalem church] regarded Paul as the great apostate, an arch enemy,”
Now everyone knows that Nang believes men are saved by works and that Paul is a heretic. She agrees with Tertullian that man is not saved by faith alone but also by obedience to the moral Law.
As the writer of her linked article affirms:
“As surprising as all of this may be to you, what I’m about to tell you is even more bizarre. There was a religious group labeled as here*tics by the early Christians, who strongly dis*puted the church’s stance on salvation and works [i.e., that salvation depended on works]. Instead, they [i.e., the heretics] taught man is totally depraved. That we are saved solely by grace. That works play no role in salvation. And that we cannot lose our salvation once we obtain it.... (Will The Real Heretics Please Stand Up, supra, at 66.)”