Answer:
He wanted to say that civilization would be destroyed if genocides like the holocaust were carried out again in the future.
Step-by-step explanation:
He meant that war crimes carried out in the second world war, especially those in relation to the Jewish holocaust, should be judged considering the size of the gravity they have and must present punishments as serious as they are, in order to prevent anyone in the future from trying repeat them, because humanity would not be able to go through it again.