World peace will become a reality when people grow up and learn to love everyone unconditionally like Jesus did. Even though Jesus rebuked the Pharisees and warned against their self righteousness, he hated no one. Jesus was a perfect example of God's love and forgiveness. It's not up to any organization to judge people and religions as wicked because they have different beliefs. Judgment is God's business. Our job is to be an example of the love Jesus taught. 
Read what the Watchtower says about hating apostates and enemies. World peace and God's Kingdom will come when all religions abandon hateful beliefs and become examples of God's love. Imagine a peaceful world where all religions unite, not in beliefs but in their love for all people.
1. In Matthew 24:42-51 Jesus speaks about a faithful slave or servant, but he also describes an unfaithful slave who beats his fellow servants. Does this not accurately describe an unfaithful Christian religion that judges and condemns all other religions and all other servants of the Lord who worship God differently? See the Watchtower Sept 1, 1989.