I am suggesting that what you believe about the Millennium—how you interpret these thousand years—is not something that it is necessary for us to agree upon in order for us to have a congregation together. The Lord Jesus Christ prayed in John 17:21 that we Christians might be one. Of course, all true Christians are one in that we have his Spirit, we share his Spirit, we desire to live out that unity. But that unity is supposed to be evident as a testimony to the world around us.
Therefore, I conclude that we should end our cooperations together with other Christians, whether nearly (in a congregation) or more at length (in working together in missions and church planting and evangelism and building up in the ministry) only with the greatest of care, lest we rend the body of Christ, for whose unity he's prayed and given himself. Therefore, I conclude that it is sin to divide the body of Christ—to divide the body that he prayed would be united.
Therefore, for us to conclude that we must agree on a certain view of alcohol or a certain view of schooling, or a certain view of meat sacrificed to idols, or a certain view of the Millennium, in order to have fellowship with one another is, I think, not only unnecessary for the body of Christ, but it is therefore unwarranted and, therefore, condemned by Scripture.
So if you're a pastor and you're listening to me, you understand me correctly if you think I'm saying you are in sin if you lead your congregation to have a statement of faith that requires a particular Millennial view. I do not understand why that has to be a matter of uniformity in order to have Christian unity in a local congregation. [The context begins about 25:00 into the audio; emphasis mine.
Some will no doubt misunderstand Dever, thinking that he denies that fidelity to Scripture ever demands that believers withhold some level of fellowship from other professing believers who are unfaithful to Scripture. Those folks would merely display their naivety. To the contrary, the clear implication of his words is that people who deny or compromise the gospel have themselves divided the body of Christ. And people who, for example, disobey Christ's command to baptize believers are sinfully dividing the body of Christ, no matter how sincere and well-intentioned their errant beliefs and practices may be.
The point is this: When we are forced by human blindness to truth to grapple with disagreements among believers, we have to make judgment calls whether those disagreements preclude fellowship (at the very least) at the local church level. That's simply unavoidable. Those judgment calls are not always easy, but far too often good judgment gives way to recklessness and pettiness. Like Dever, I do not understand why churches must demand uniformity on the timing of the Millennium. I have not heard anything approaching a compelling argument to that end, and it is utterly incomprehensible to me when I hear of godly, fruitful men who lose their positions in ministry over the timing of the Tribulation. May God grant us repentance when we needlessly divide the body of his Son.