Other people's false idols are harmless, because they do neither harm nor good. Why spend all this time on them, then? So what does the god of this book do? Well, he creates earthquakes, and he made the earth, he controls the weather. He decides who lives where and whether dragons will move into the places he destroys. And he punishes heathens. Basically, he's a god created by subsistence farmers with no knowledge of science or advanced agricultural practices and who were completely dependent on good weather for their continued existence.
Jeremiah explains AGAIN that he's just the messenger, sent to deliver god's word of doom and destruction to the people of Judah who refuse to follow the covenant and are therefore keeping the rest of them from their promised land of milk and honey. Sweetie, those people are always going to be there. They're harder to get rid of than bedbugs. And all this smiting and burning and starvation doesn't seem to be helping in the least. But today god has a new tactic: the good people, all two of them, are not to pray for the bad ones anymore, even when he's killing them through war and famine.
Jeremiah asks the age-old questions Wherefore doth the way of the wicked prosper? wherefore are all they happy that deal very treacherously? (v. 1) He asks god to punish them. Yeah, that'll happen. Jerry Falwell's answer ought to be enlightening for its lack of enlightenment: The problem that the wicked seem to prosper is discussed often in the Scriptures. No definitive answer is given except that, according to God's most wise and holy purposes, all things are under His control and that he will deal justly with the wicked in His appointed time and way. It is enough for the believer to leave things in God's hands and let Him truly be God of his whole life.