Revelation 20 and "the rest of the dead"

When dealing with amillennialists, I have eventually taken them to Revelation 20:4-5.

Revelation 20
4. And I saw thrones, and they sat on them, and judgment was committed to them. Then I saw the souls of those who had been beheaded for their witness to Jesus and for the word of God, who had not worshiped the beast or his image, and had not received his mark on their foreheads or on their hands. And they lived and reigned with Christ for a thousand years.
5. But the rest of the dead did not live again until the thousand years were finished. This is the first resurrection.

This text presents a problem for amillennialists, but they do not seem to grasp why. Each time I engage them on this point, the conversation takes a different turn. Basically, they stop the conversation.

Let me explain the significance of this text.

According to amillennialism, when a person becomes saved he immediately starts reigning with Christ is this kingdom. Further, they assert that the coming to life in verse 4 is a spiritual resurrection.

Verse 5 says that another group of people will not live again until after the thousand years. If the second group (the rest of the dead) is supposed to be believers, then you have a group of believers who DO NOT immediately start reigning with Christ. If they are unbelievers, you have them given life at the end of the thousand years, thus teaching universalism.

There is nothing within the context to say that the coming to life in verse 4 is spiritual. Further, there is nothing within the context to say that verse 4 is spiritual and verse 5 is a physical resurrection.

The fact is, the resurrection in verse 4 is described as happening when Christ returns. To make that into a spiritual resurrection does much harm on the status of believers between their death and physical resurrection.

In 20:4, we are told that a certain group of people "lived and reigned with Christ for a thousand years", specifically, those who were faithful to Christ. This same group had been killed. So they were already regenerate or spiritually raised. They are then spoken of as living and reigning because of a resurrection. They were not spiritually raised twice.

Another group of people are spoken of in verse 5. They are called "the rest of the dead". The identity of "the rest of the dead" can only be unbelievers. Believers are already reigning with Christ. There is NO OTHER group. Verse 5 says that they will not "live again" until after the 1000 years. If "live again" in verse 4 is a reference to spiritual regeneration, then you must also have unbelievers being spiritually raised after the 1000 years. This is precisely why Origen taught universalism and might be why catholics believe in a purgatory. Hell only becomes a temporary (albeit long) punishment.