It is a matter of facing reality, Sharik. Stalin was a mass murderer. As for Putin, can a man who has assassinated journalists, political opponents and other innocent people be forgiven by the Lord Jesus Christ? Yes, there are many testimonies of people who became born again Christians and repented of such wicked behavior (murder, lies, deceit). Your best response? Pray for Putin that God will open his eyes. Pray for your people, that they will turn to the Lord Jesus Christ and be saved. That is what you should do.