Answer:
He's saying by choosing him, they are in effect going beyond him as an individual and recognizing all the victims of the Holocaust.
Throughout the speech, he references "survivors and their children" to the Jewish people as a whole" using these phrases emphasizes this award is about all survivors.
Explanation: Wiesel was delivering this speech as a result of being awarded the Nobel Prize. In this speech, he states, "No one can speak for the dead..." In this speech, how does he justify his right to take on this role?
He justifies himself because he says the honor belongs to the survivors and he is a survivor, but he is also a Jewish person which makes him a credible voice to speak.