No, Jesus isn't Dirty Harry. Clint Eastwood does well in Hollywood because we as human beings often like to see the bad guy get what's coming to them. However, in Jesus' upside down cruciform world, justice is mercy!
Jesus said, "Go ahead and make my day," by forgiving us of our sins; by entering into our darkness; by becoming one of us; taking on our vengeful, hateful, get the bad guy nature, and recreating us to be what we were meant to be - God's divine children.
The gospel of Jesus Christ is the good news of God's mercy, kindness, compassion, and forgiveness, that is based on who God is. God is love. Father, Son, and Holy Spirit have always lived in other-centered-love, because that's God's nature. The true God is revealed only in Jesus Christ. There isn't another God that looks something like Dirty Harry. God is not vengeful. God is not angry. God is not a psychopath. Father, Son, and Holy Spirit look, just like Jesus. They are all one, but distinct. The great mystery of God is revealed in Jesus. God is not defined by our favorite scripture. True knowledge of God is revealed only in the person of Jesus Christ.
The gospel is both a proclamation, an announcement of what has already been accomplished in Christ, and it is also an invitation to participate in the life of God. Yes, it is finished! In Jesus' person and work, salvation for humanity is completed! However, we are invited to share in this relationship of other centered love. We are invited to celebrate the good news, which is sharing in the resurrection life of Christ! He is risen, and so have we! He is seated in the heavenly realm above all, and so are we! It's not an obscure religious life that we've been invited to share; it's the Reality of a new life in Christ Jesus! Although we are one in Christ Jesus, we are distinct from Jesus.
In Jesus' heavenly realm, there is no need for Dirty Harry. Jesus has conquered all his enemies not by blowing them all away, but by surrendering to them. "Them" is us! For if while we were enemies we were reconciled to God, through the death of his Son, much more, having been reconciled, we shall be saved by his life (Rom. 5:10 NASB). God loves everyone, including his enemies. That's why he taught us to do the same (Mat. 5:44).