Jesus is God-with-us, Emmanuel. The great mystery of God becoming human is God's desire to be loved by us. By becoming a vulnerable child, completely dependent on human care, God wants to take away all distance between the human and the divine.
Who can be afraid of a little child that needs to be fed, to be cared for, to be taught, to be guided? We usually talk about God as the all-powerful, almighty God on whom we depend completely. But God wanted to become the all-powerless, all-vulnerable God who completely depends on us. How can we be afraid of a God who wants to be "God-with-us" and needs us to become "Us-with-God"?