The rational for killing the local population is fundamentally different
Nanking was massacred as punitive action for resistance, not as a means of creating space for the Japanese. They Japanese did have "colonists" in Manchuria, but if you know any geography that's nowhere close to Nanking.
Nanking was massacred as punitive action for resistance, not as a means of creating space for the Japanese. They Japanese did have "colonists" in Manchuria, but if you know any geography that's nowhere close to Nanking.