The Way

That in human nature, he might on our behalf, perfectly, obey the whole law and suffer the punishment for human sin, and also that he might sympathize with our weakness.

Only one who is truly human and also truly God.

No, every sin is against the sovereignty, holiness, and goodness of God, and against his righteous law, and God is righteously angry with our sin and will punish them in his just judgment both in this life and in the life to come. 

Idolatry is trusting in created things rather than the creator for our hope, happiness, significance, and security. 

Sin is rejecting or ignoring God in the world he created, rebelling against him by living without reference to him, not being or doing what his law requires, resulting in our death.

That we may know the holy nature and will of God, and the sinful nature and disobedience of our hearts; and thus our need of a Savior. The law also teaches and exhorts us to live a life worthy of our Savior.

No, but because of the disobedience of our first parents, Adam and Eve, all of creation is fallen. We are all born in sin and guilt, corrupt in our nature, and unable to keep God's law.