Yes it is true. Read your bible. God never told him to go down off the mountain and kill people. Moses had many killed except his brother who had actually made the golden calf.
Yes Moses did refuse to acknowledge his sin. He blamed the people for God being mad at him, when it was he who sinned. (Deut 1:37).
Beware the yeast of the Pharisees.
Notice the similarity between Pharisee and Pharaoh? Who raised Moses?
Jesus came for the LOST sheep.
Just because you PERCEIVE something as first, doesn't mean it was first. Jesus told you, recognise the SIGNS OF THE TIMES.
Look past the words and see the Word anon. Jesus Christ is the Way, the TRUTH, and the Life. All who came before him were liars and thieves.
Seek Truth!