Israel as a nation is never made a slave, except when she sins against God so seriously that He gives her over to her enemies as He once delivered the race to Satan. For a nation to be delivered means there must be a war with the Satanic king. Redemption From Sin To be redeemed from Satan means to be redeemed from sin. Unless Christ took the penalty of our sins for us, we could not escape making the payment ourselves. Salvation does not mean a relaxing of God's justice.
Redemption also means deliverance from the power of sin.
God has not taken us out of Egypt in order to kill us in the wilderness. We are redeemed from the power of sin so that we may bear the fruit of righteousness for His kingdom. Redemption also means the final and perfect deliverance of our bodies from all of the effects of sin in the resurrection. Unlike the ancient Greek pagans, Christians do not see the body as the source of our problems. On the contrary, sin began with a spiritual being who has no body, Satan.