Do two walk together, Unless they have agreed?
Aside from the viewpoint of basic humanism regarding the oppression of the poor, most "modern men" find nothing at all wrong with the conduct of the Israelites.  Such vices as drunkenness, adultery, fornication, idol-worship, neglect of religious duty, etc., are merely "doing what comes naturally."  Despite the unawareness of the terrible sinfulness of sin which characterizes our own generation to a degree rivaling, we fear, that of ancient Israel itself, God still rules in the kingdom of men; offenses against God will be severely punished; and nations that forget God shall be turned to destruction, regardless of whether or not "modern man" believes it.  Ancient Israel did not believe, nor did any other of the eight nations confronted by the judgments of Amos' prophecy; but where are any of those nations now?