Richard Goldstone in The Jerusalem Post:
I begin with my own motivation, as a Jew who has supported Israel and its people all my life, for having agreed to head the Gaza mission. Over the past 20 years, I have investigated serious violations of international law in my own country, South Africa, in the former Yugoslavia, in Rwanda and the alleged fraud and theft by governments and political leaders in a number of countries in connection with the United Nations Iraq Oil for Food program. In all of these, allegations reached the highest political echelons. In every instance, I spoke out strongly in favor of full investigations and, where appropriate, criminal prosecutions. I have spoken out over the years on behalf of the International Bar Association against human rights violations in many countries, including Sri Lanka, China, Russia, Iran, Zimbabwe and Pakistan.
I would have been acting against those principles and my own convictions and conscience if I had refused a request from the United Nations to investigate serious allegations of war crimes against both Israel and Hamas in the context of Operation Cast Lead.
As a Jew, I felt a greater and not a lesser obligation to do so. It is well documented that as a condition of my participation I insisted upon and received an evenhanded mandate to investigate all sides and that is what we sought to do.
More here.