Peadobaptism is a touchy subject with some Christians. Nazarenes handle it with finesse. We decided a long time ago as Wesleyans and Holiness peoples came together that we weren't going to risk splintering the church along certain lines. Therefore, we both baptize infants and we dedicate. I am a Nazarene because we value children, even infants, enough to allow them the grace of baptism.
Baptism is not merely a symbol, if we believed that, we would not be Wesleyan. Baptism, because it is a sacrament, is a means of grace. It is a sacred event by which God bestows his grace to both the catechumen and the congregation. The Church of the Nazarene recognizes that God's grace is even given to infants.
But why do we insist that it's okay to baptize infants, they don't even understand it? Many, even Nazarenes, insist that the catechumen understand baptism before receiving it. It is as though God's grace must be understood by the receiver before God can give it (and who in their right mind would put this limitation on a free God?). Who is to say any adult understands baptism? Most don't know what a sacrament is, yet God gives his grace freely through the sacred event of baptism. Requiring a person have faith before they are baptised is to miss the point of baptism as a means of grace. Baptism calls us to faith. Requiring the faith to which baptism calls us before we are baptised would be to set up a new works-righteousness, and really nobody wants that.
When we understand that baptism calls us to the faith that God gives us, we begin to see that to deny infants the waters of baptism would be to deny God from giving his grace and faith even to an infant. I am a Nazarene because we love children/infants enough to understand that God graces them as much as, if not more than, he graces us.