"so Satan, bearing the guilt of all the sins which he has caused God’s people to commit, will be for a thousand years confined to the earth, which will then be desolate, without inhabitant, and he will at last suffer the full penalty of sin, in the fires that shall destroy all the wicked. Thus the great plan of redemption will reach its accomplishment in the final eradication of sin, and the deliverance of all who have been willing to renounce evil." {GC 485.3}
The Bible does not teach that the scapegoat is "the sin offering" rather only the Lord's goat in Lev 16 is "the sin offering" -- only it dies a substitutionary atoning death on behalf of others. Nor does the Bible teach that sins are removed from the Lord’s goat before it is slain – and placed on the scapegoat. (Nor does the 28 FB beliefs say that - nor do official SDA statements say it - no not even ones from Ellen White (your favorite source apparently) -- The scapegoat is not a sin offering.