On July 8, 1741, Jonathan Edwards preached his most famous sermon, "Sinners in the Hands of An Angry God."
The underlying theme of revivals is that there first needs to be the preaching of the Law before people see their need for the Lamb;
that God is a just, and as such, He must judge every sin;
but God is love, in that He provided the Lamb to take the judgement for the sin.
A bathroom mirror can show a person how dirty their face is, but it has no power to cleanse their face. It does though, create a desire for a person to use the soap and water to wash their face.
The Law shows a person how sinful they are, but it has no power to cleanse them of sin. It does, though, create the desire for them to have their sins washed away by the blood of the Lamb. (Revelations 7:14)
If God does not judge a sin, His silence effectively gives consent to it, as in law, silence equals consent.
Wedding ceremonies have a line, if anyone objects, "speak now or forever hold your peace." If you are silent, holding your peace, you are giving consent.
If God is silent in the face of sin, He would be giving consent to sin, and if God gives consent to sin, He is no longer a just God, He would be denying his just nature.
To ask God to overlook a sin is to ask Him to deny Himself, and "God cannot deny Himself." (2 Timothy 2:13)
But God is a loving God, in that He, Himself, provided the Lamb to take the judgement for our sins.