Those who encounter Christ are awed by Him. For some (e.g. the Magi), their awe leads to conversion and worship of Jesus. For others (e.g. Herod), their awe causes them to rebellion and to embrace Satan.
Herod embraces Satan fully when he orders the slaughter of the Innocents (Matt 2:16-18). Jimmy Akin offers a short tutorial on the evil of King Herod.
What Child is this, who strikes fear into great kings? The one Lord Jesus Christ.