I apologize in advance for the extreme political incorrectness of what follows. In the hope of persuading the reader that I raise these issues with no pleasure at all, I shall preface them with some personal notes. I am a British citizen, lawfully resident in the United States. Now let us proceed. In the first place, I do not think it at all improper to pose questions of this sort, though I have no doubt many people do so think and that I shall meet heavy criticism for having posed them.
War is a fierce and desperate business.
In such a situation you do what you have to do, while trying to hold on to as much decency and legality as you can spare. The reason why these questions are particularly acute in respect of the Chinese are, I think, fairly widely known. Modern war is very technological. In many fields, they dominate. I myself live just four miles from Cold Spring Harbor lab, a major center of research in microbiology and genetics.