Christians: Who is to blame for sin in this world?

Sin originated with Lucifer, who was the covering cherub, that means that he was second closest to God, Micheal being the first next to God. Lucifer insinuated that the government of God was selfish, and that the angels did not have to obey the Laws of God (the 10 commandments), Lucifer was also jealous of Micheal, because Lucifer was not (nor was any angel) allowed into the counsels of God, only Micheal was allowed, and that was because He was and is the only Begotten Son of God! Anyway, in due time Lucifer/satan and the angels that were his followers, were expelled from Heaven. When God created this world, Adam and Eve had the same characters as the Holy Angels of God, but when them disobeyed the command of God, their characters were changed to that of their new owner, satan, whose character is evil, as ours is. There is no way that God can change, nor can he change the statement of His character (the 10 commandments), so, because both He and His Son love us, God sent His Son to pay the penalty for disobedience for us. So you see, there is virtually no way God can be held responsible for disobedience, because, He can no disobey Himself. Why do we sin? Because we have the same character as satan, but when we are saved from our sins, our character is changed.