It makes God angry that we don't obey him as king. It also makes him angry that we are selfish, and hurt each other, and make a mess of his world.

God won't let us keep saying 'No' to him and pretending to be our own king instead.

One day, God will show everyone that he is the only true king. He will set up a wonderful kingdom that never ends. And on that day, everyone who has been saying 'No' to him will be shut out of his kingdom forever.