Evangelism is about relationships. Relationships are often what often make or break the witness of Christ.
The Gospel is a call for mankind to have a new joyous relationship with God. And to enter into God's work in the world through God's church.
The Gospel is about a persons relationship to God, relationships to family, relationship to other Christians, and relationship to the whole world. Since Christianity is a call to right relationships evangelism should be mindful that the Gospel is not simply a message, but a invitation to relationship.
God calls us to enter into right relation to everyone in the whole world if it was within our power. Often it is outside of our power, but we are called to live at peace and right relation with all people so much as it is within our control.