During the 1000 years when Satan was bound and Jesus was ruling in the Kingdom, did Jews continue to sin. If Satan, who is the ruler of sin was not present, where did sin come from?
Regarding those who are present on earth at Jesus' Second Coming, Pastor Armstrong teaches that Jewish believers will be given new, eternal bodies for the Kingdom at Christ's return, so all Israel will be glorified in the Kingdom and none will sin.
There is some disagreement among scholars on this point, since some scriptures seem to indicate that Jews in the Kingdom could retain natural (i.e. sinful bodies), however Pastor Armstrong takes the view that all Israel is glorified in the Kingdom based on the preponderance of Biblical evidence.
On the other hand, we do know believing Gentiles enter the Kingdom in natural bodies following Tribulation, and these human beings will bring sin into the Kingdom. While Satan tempted mankind to sin in the beginning, today our sin is not the result of Satan's activity. We sin because we inherited a sin nature from birth, which has been passed down since Adam.
Satan and his demons tempt human beings to give in to their sinful nature, so with Satan bound, there will be less opportunity for sin, but sin itself does not go away.