It is not so much a lack of the availability of true knowledge as it is a lackadaisical, careless, "it really does not matter all that much," "any way is as good as any other," "sin is not really all that bad" approach. It at first might seem to be a gentle form of stubbornness, but the real problem here is two major spiritual sins: pride and covetousness. In effect, Israelites are guilty of telling God that He does not know what He is talking about. As a nation, we are somewhat like teenagers who tell their parents that they are "out of it" old fogies, but it is far more serious than this.
Generally, Israelites are not a particularly violent people. However, our pride influences us, as Amos shows, to be deceitful and sneaky and to take advantage of those weaker than ourselves. We are masters of competitively seeking advantage, not for the purpose of sharing, but to get for the self. Consider Jacob's characteristics in his dealings with Esau and his father-in-law, Laban.
However, these sins are just as much deviations from God's standards as the violent and vicious sins of the Gentiles. Sin is sin is sin. God nowhere says, "This level of sin is passable"; sin will always be failure. "The wages of sin is death" (Romans 6:23). The continuous nature of these pesha' sins (presumptuous transgressions) strongly indicates that they will not be repented of.
John W. Ritenbaugh
Sin, Christians, and the Fear of God