1) While Moses is with God, the people on the sands below have become impatient. They demand that Aaron make visible gods like they're used to and the people worship the golden calf idol, sacrifice to it, and claim that the idol brought them out of Egypt -- utter blasphemy.
2)Lord are angry at sin can't be understood apart from his own holiness, his separateness from sin, his nature utterly opposed to injustice, sin, and human degradation.
3)Yes, Lord's word is true and justified.