“They will not be in the council of my people.” To understand this, we need to realize that the nation of Israel was mostly related by blood, but because God opened membership in the community to people who worshiped Yahweh and kept his laws, more than anything Israel was a community of people who had a covenant with Yahweh and worshiped Him in the ways that He prescribed. But these false prophets had gone so far against God that He denies they are part of the community of Israel, He “dismisses their claim to membership in the earthly community of faith—the people of Yahweh” (Daniel Block, The New International Commentary on the Old Testament: The Book of Ezekiel). God has stated in a very graphic way that these false prophets would not be saved and be part of the Messianic Kingdom of Israel (the Millennial Kingdom).
“written down in the register of the house of Israel.” In this context, the “register” is the Book of Life, in which the names of those who are saved are recorded (cp. Ps. 69:28; Phil. 4:3). Before the Day of Pentecost which started the Christian Church and the Age of Grace, and after the Rapture, a person could sin so badly that he had his name expunged from the Book of Life (cp. Exod. 32:32-33; Rev. 3:5; 22:19). For God to say that the false prophets would not be in the register of Israel was another graphic way of saying they would not be in the Book of Life, and so they would not have everlasting life in the Messianic Kingdom.
“neither will they enter the land of Israel.” The promise to Abraham and the patriarchs was that they would inherit the Promised Land, the land of Israel (see commentary on Genesis 15:8). Ezekiel 37:12-14 tells how Israel will get back to the land. It specifically says that God will open the graves and bring the Israelites back to the land of Israel. Ezekiel 37:13-48:29 specifically lays out how the land of Israel will be divided to the different tribes of Israel in the future Messianic Kingdom on earth. So to say that the false prophets would not enter the land of Israel was a powerful and graphic way of saying that the false prophets would not be given everlasting life. The three statements together, about not being in the council of God’s people, not being in the register of the house of Israel, and not getting to enter the land of Israel struck at the very heart of everything the common Israelite hoped for and what it meant to be an Israelite. God’s harsh words would hopefully turn some false prophets from their sinful ways while discouraging other from following in their footsteps. [For more on Christ’s Millennial Kingdom on earth, see Appendix 3, “Christ’s Future Kingdom on Earth”].
We should take note that these false prophets had taken it upon themselves to say they were speaking the words of God when they were not. Everyone sins, but it is a very serious sin indeed to say that you are speaking for God when you are not.