How were the Nuremberg trials a hybrid court system?

They were unique, in that no horrendous atrocities such as the Third Reich had ever happened before.

Hitler's ambitions were to conquer the entire world- he was developing the hydrogen bomb, intercontinental delivery weapons systems, all manner of horrific poison gases, and Goodness knows what else. It took the combined efforts of the rest of the civilised world to destroy his regime and all that it was working for, even if they were ideologically opposed- for example, the USSR was hardly ideologically allied to the Capitalist West, but they knew evil when they saw it, and also knew that there was a difference between political opposites and unmitaigted wickedness. They thus allied themselves with the rest of the world in fighting to defeat Hitler.

The Nuremburg Trials thus saw a 'hybrid court'- some representatrives were from the Eastern Bloc, some were from the Wetsern countries. But they had ALL suffered under Hitler's regime. There were differences as to how the culprits should be punished, and furious arguments broke out regarding what should be done about them, but ultimately, no-one argued that the culprits should be punished or sentenced to death- just HOW they should be