what motivates ganelons hatred of roland

Roland nominates Ganelon as emissary to Marsile; Ganelon is furious, and believes that Roland wants him to do. He threatens Roland, but Roland coldly dismisses the threat and says that he only sought a wise emissary. He offers to go in Ganelon's place, which makes Ganelon angrier. Ganelon accepts the task, certain that he will die. He tells Charlemagne that he hates Roland, and he also hates Oliver and the rest of the twelve peers because they love Roland. Charlemagne rebukes him, insists on him going, and invests authority in him by giving him his staff and his glove. But Ganelon drops the glove, which the rest of the Franks take as an evil premonition.