Freely Justified by God's Grace

Why do most preach free grace with conditions even though it contradicts the Word of God? What is the law meant to do? How does God have mercy on sinners? Does God set aside His law for any sinner? When did God plan for the righteousness of God to be in His Son? Is there any difference in how God justifies sinners? Was Jesus able to satisfy all the demands of the law? Do sinners have to do anything to be ‘saved’? How is our faith tainted by sinful flesh? What is the mercy seat meant for? Why is the innocent blood of a man critical for forgiveness? How is salvation all about God’s righteousness? Why is boasting ‘excluded’ by the law of Faith? What is the difference between the law of Faith and the law of works? How is the word Faith synonymous with Christ? How does God give you belief by giving you Christ?