Diomont is one of the three gods, along with Sthartalock (god of evil) and Moonont (god of neutrality). He was the most powerful god, but he was defeated by Sthartalock, and divided into two parts: half of his genes ended up on earth, the other half in the Buskert ship. In order for Diomont to be resurrected, he needs the Buskert ship to impact the earth, causing the extinction of humans. That’s why he wants humans extinction. That’s why he is mad at you.