It is obviously a recent innovation starting with John Nelson Darby in the 1830’s and is certainly not confessional. Dispensationalists reject Covenant Theology (chapter 7), the abiding validity of the moral Law of God (chapter 19), the Christian Sabbath (Chapter 22), and the eschatology of the Confession (chapter 31) among other things. But the biblical problems are greater.
First of all, its novel idea that the Church and Israel are a separate people of God. From the earliest times of the Church, the Church saw itself as coming in place of Israel as the people of God. Dispensationalists derogatorily refer to this as Replacement Theology. Call it what you want, the Scriptures teach that the Church, Jewish and Gentile believers, are the Israel of God and the history of Christian theology up to Darby proves this. If you would read the old commentators, they would always refer to the Old Testament prophecies of restoration and prosperity as relating to the Church as the singular people of God. No doubt, a lot of the commentators saw also a latter day restoration of Israel (e.g. John Gill does this very often), but not as a separate people of God. But there came a change with the prominence of Dispensationalism, and the promises of God to His Church were taken away and given to an earthly and fleshly people, i.e., only to physical descendants of Abraham. They contended that we must separate Israel and the Church. They are not one people, but two different peoples of God, one heavenly and the other earthly with two separate plans. To defend this novel teaching, Dispensationalists do not allow the New Testament to interpret the Old. It is our belief that the New Testament should take precedence over the Old, not because the Old was not inspired or the New is more inspired. Rather, it is our belief that there is a greater clarity in the New Testament than in the Old. The Old was filled with types and shadows, but in the New we have the reality in Christ. Moreover, the interpretation of the Apostles of the Old Testament is the correct interpretation of the Old Testament, not the “literal” interpretation of Dispensationalists. Let me give you a few examples.
In Galatians 3, the Apostle Paul interprets the Abrahamic Covenant to have had promises made to Abraham to his singular Offspring who is Christ (Gal. 3:16). Then he goes on to say that “if you are Christ's, then you are Abraham's offspring, heirs according to promise” (Gal. 3:29). Also,
Gal. 3:7-9 Know then that it is those of faith who are the sons of Abraham. 8 And the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, “In you shall all the nations be blessed.” 9 So then, those who are of faith are blessed along with Abraham, the man of faith.
It is the teaching of Dispensationalism that the Abrahamic Covenant forms the basis that Israel must remain as the people of God and is always entitled to the Promised Land, and that Israel has not yet attained to the (complete) fulfillment of that promise. But this is contrary to the clear teaching of Scripture that all the promises were indeed fulfilled to Israel (e.g. Josh. 21:43-45) which were made to the physical seed. Yet, as we saw, the seed or offspring which had the promises made to, according to Paul, was the Lord Christ. It was to Him and to Abraham th...