There are numerous passages showing that God judges evil, from His warning of death for eating the fruit of the Tree of the Knowledge of Good and Evil (Genesis 2:17) and Adam and Eve subsequent expulsion from the Garden of Eden (Genesis 3:14-21) to the final judgement at the end of time, to the words of warning to those who add, or take away from, the words of Revelation (Revelation 22:18-21).
Judgement sounds harsh but it is actually an aspect of the goodness of God. God will deal with evil and rid the creation of it. he will establish His Kingdom of pure goodness and joy. That is a good thing. There can be no justice without judgement.
Furthermore, God, in His great mercy, has provided for the forgiveness and salvation of every person. He loved the world so much that He sent His one and only Son so that whoever believes in Him might not perish but have eternal life (John 3:16).
God's judgement was executed when Jesus died on the Cross. It was terrible but Jesus took it in or place, bearing our sins. The price having been paid, there is no price remaining for us to pay. We simply have to have faith in the fact that Jesus has paid the price, in order to be forgiven.
The reality of our faith will be seen in our changed life. Repentance means we choose to no longer go our own way but to live God's way.