The people (and their property) in the temple didnt belong there. Maybe learn how to act in the temple of God, and show some reverence and you won't get whipped.
"A bruised reed he will not break, and a smoldering wick he will not snuff out."
Today, there is no temple of God made with hands. However, Jesus' response to depravity in the old temple gives us insight into His position now when men take advantage of others.
"It were better for him that a millstone were hanged about his neck, and he cast into the sea, than that he should offend one of these little ones."
Prince of Peace is a title that literally means "One who overthrows the establishment of chaos". Peace is a term of art intimately connected to war. It is not the absence of war, it is the eradication of the enemy's ability to make war with you. However violent that sounds, the Lord has never instructed one of His to strike another person or to kill another person. Men, however, will live and die by the sword they use to assert their dominance. Men will curse themselves by using the ways of the world to establish their own hegemony.