Matthew 2:3

Through fear of losing his kingdom, he being a foreigner, and had obtained the sovereignty by violence. But why was all Jerusalem to be alarmed at the news of a king so long and so ardently expected? 1. Because the people, well acquainted with the cruelty of Herod, feared a more galling slavery. 2. Through apprehension of riots, and of a revolution, which could not be effected without bloodshed, as the Romans had such strong hold. They had also been so worn down with perpetual wars, that the most miserable servitude, with peace, was to the Jews an object rather of envy than deprecation. (Haydock)