I do not believe the doctrine you quote is correct. It probably stems from wishful thinking. If true, it takes away somewhat from the urgency of preaching the gospel, since it proposes that everyone is going to get another chance after the millenium to live a physical life and be converted.

I cannot see the Scriptural basis for this in the texts quoted. They are going way beyond Scripture.

As I read the Scripture, everybody will be resurrected, but the wicked will have a resurrection of condemnation.

John 5:28 Do not marvel at this; for the hour is coming in which all who are in the graves will hear His voice
John 5:29 and come forth— those who have done good, to the resurrection of life, and those who have done evil, to the resurrection of condemnation.

Jesus did not say - those who WILL THEN DO EVIL, to the resurrection of condemnation, but THOSE WHO HAVE DONE EVIL.

Yes, it is sad that so much deception plagues the church. Our only defense is to trust Christ, and then major on the doing the majors - prayer, listening to God's Word for ourselves, talking about Christ, loving the brethren and those outside.