If you’re familiar with McKnight’s soteriology, it’s significant that he asserts that the gospel is identified in 1Cor 15:1ff. (I agree.) Where he errs is when he asserts that the mechanism(s) to appropriate the benefits (What do I personally have to do to be saved?) of the gospel are found in the 4 gospels (Matthew, Mark, Luke, and John) and Acts. He specifically rejects that it’s found in Romans.
Many agree and follow this approach, but I would submit that it’s fundamentally flawed in that if fails to distinguish between the fact that the Biblical message has two primary threads: 1) Message to the Unbeliever, and 2) Message to the Believer. If you mix the two, you end up contaminating both messages and incoherency/inconsistency results.
A good example is the book of James. Failure to recognize that it is addressed to believers and not unbelievers results in a legalistic gospel where the phrase “faith without works is dead” is seen to suggest that if one lacks works, their faith is insufficient (Arminian) or invalid (Calvinist). Both, of course, are wrong. Faith without works means just that, faith that isn’t put to use in the everyday life of the believer will result in an incredible testimony that discredits the Christian faith writ large, and worse, at the individual level, it can result in a bad outcome in the temporal life of the believer including a premature death. An example would be related to our domestic laws that prohibit drunk driving. If you believe the law is a good one and should be obeyed, but you drive drunk on a routine basis, you’ll be seen as a hypocrite by everyone, and worse, you’ll be putting yours and others lives at risk if you drive drunk. In this example, the issue is not whether or not you are a qualified and licensed driver, but how do you use your status as a driver? Likewise, believers are enjoined by James to behave responsibly and safely so they can fulfill God’s plan for the believer. A speeding ticket does not suggest that one is not a qualified and licensed driver. Instead, it makes a statement to the world about how good or bad a driver one is. Arminians will look at the ticket (especially a pattern of tickets) and conclude the drivers license should be revoked. The Calvinist will look at the ticket(s) and wonder if the driver even has a license to begin with. Both are wrong. The tickets says that the licensed driver has broken the law and is not paying attention bringing risk to all drivers and to oneself. Repeated infractions will bring discipline and perhaps jail.