Cut and Drowned in Christ (Colossians 2:11,12)

So often I hear that the sacrament of baptism is administered only after someone makes a profession of faith while circumcision is something that is applied to children in the Old Testament.  The reason that is given is that the Old Testament was a physical promise tied to a land while the New Testament is about the Spirit working in the lives of God’s people.  The appeal is by looking to the book of Acts where we see someone profess their faith and then they receive baptism.   If this case is so cut and dry then why is Christ circumcised and baptized?  How can these signs encourage a church that is flat scared of what will happen tomorrow?