In the first chapter, the prophet Habakkuk was upset with God because He had made prophecies regarding where Judah's punishment would come from—from the Chaldeans. Habakkuk was irritated by this because he considered the Chaldeans to be worse than the Judeans. His questions run: "God, why are you doing this? Why don't you at least punish us by a righteous nation instead of sending upon us a nation far worse than we are?"
That was the way Habakkuk looked at it. God did not look at it that way because He would not have sent the Chaldeans if He did not think it was the right thing for Him to do. Maybe they were worse in an overall sense, but who was more responsible for what they were—the Chaldeans or the Jews? Had the Chaldeans had God's way revealed to them as the Judeans had? Of course not. Maybe the Judeans were not as bad on paper, maybe statistically, but they were more responsible. To whom much is given, much is required (Luke 12:48).
God would punish them with a hasty nation, He says, a nation violent and rapacious in the way it did things. Habakkuk did not like that one bit, so he appealed to God, and his appeal was hotly delivered.