WHY GOD WAS ANGRY ABOUT DAVID'S NUMBERING OF PEOPLE

First and foremost,  David's  intention was judged by his words when he  says, "number  the people  that I may know it." He  was attributing  Israel's victory  to himself and the number  of the people in the army. Isaiah 42:8 says God will never share his glory to another. A similar incidence happened to Moses when God told him to speak to the rock to bring forth water for the people in the wilderness and he instead struck the rock twice and said, hear now you rebels, must we fetch you water out of this rock? He was attributing  the power  to himself and Aaron. Numbers 20:1