When the Lord Jesus was crucified He said, “It is finished,” which shows that God’s salvation work for mankind was complete. So how can you say that God has done a further stage of work to judge, cleanse, and save mankind?

The Answer from God’s Word:

When Jesus came, He also did part of God’s work, and spoke some words—but what was the main work He accomplished? What He mainly accomplished was the work of crucifixion. He became the likeness of sinful flesh to complete the work of crucifixion and redeem all mankind, and it was for the sake of all mankind’s sin that He served as a sin offering. This is the main work He accomplished.

from “All Is Achieved by the Word of God” in The Word Appears in the Flesh

How does God treat those who believe Satan’s rumors and turn their backs on Him?

Bible Verses for Reference:

And the serpent said to the woman, You shall not surely die: For God does know that in the day you eat thereof, then your eyes shall be opened, and you shall be as God, knowing good and evil. And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also to her husband with her; and he did eat. … Therefore Jehovah God sent him forth from the garden of Eden, to till the ground from from where he was taken (Genesis 3:4-6, 23).