William Burkitt on Matthew 2:3

Observe here, That when Christ came into the world to save men, it cast the world into a consternation, and caused wonderful disturbances. Herod is first concerned, and next all Jerusalem with him; Herod for fear of losing his kingdom, Jerusalem for fear of new commotions. Thus Christ, who was the angel's song, the wise men's joy, Israel's consolation, becomes Herod's fear and Jerusalem's terror.

But why was Herod thus disturbed? It is true a king is born, but one whose kingdom is not of this world; it was Herod's false apprehension that was the cause of this perturbation.

Hence we see, that the greatest enmities and bitterest animosities have arisen from causeless fears and groundless jealousies.