Whether it's 100 years or 800 years, it's limited and not eternal. Since Isaiah 65 tells us that ~God's~ people have a life only as long as a tree and if we must take this passage literally as xzins insists, then Pre-Millennialism's Millennial Kingdom has the God's people dying during the Millennium.
That's the point xzins missed!
But don't worry, all men and women will rejoice that their Christian brothers, sisters, sons and daughters will die -as there will be no weeping or sorrow in this Millennial Kingdom -only rejoicing!
Jean