That is what I think John is trying to relate. That those martyred is of the first to be resurrected and the rest that are dead will not be raised then but will be resurrected at the finish of the 1000 years, Why? It would be simple, for they are the ones that have died naturally. That is one reason I bring up the crops of the harvest for they show us this dividsion. Barley being the first to be resurrected from the ground as overcomers. Then the wheat will come later. But it's as if no one can see that relationship.
I think that scripture shows us that. Rev.7:1-17 shows us both the 144,000 and an great multiude those that come out of the great tribulation, both of these are martyred and shown in Rev.6:9-11 that await for those that come out of the great tribulation. Those both are given white robes.I think the 144,000 are raised before other believers.
Yes, Jesus does say "all", but if some are raised first, the "rest of the dead" would be all that are in the graves, wouldn't they?