Frank Burns is a war monger, he has tantrums when blood transfusions or life saving treatments are given to enemy soldiers, but at the same time, he's a vulnerable clown. Would he really want a fellow doctor and his long term colleague and friendly rival to be executed for mutiny? Yes, during war, people like Frank take pleasure in killing their enemies but has Hawkeye really tormented him that much for Frank to bring charges that might result in Hawkeye's death? I'm not ruling it out. It's just something to ponder.