This article in no way refutes or undermines Goldstone. You need to learn to read language in context rather than taking a few comments, distorting them and declaring some nonsensical conclusion. What the article is saying, in part, is that Israeli leaders' words made it obvious to the world that Israel was going and planning on going beserk. This, along with videos of white phosphorous attacks and reports from UN facilities under fire, got the attention of the UN. Nothing in the article remotely suggests that all information considered by Goldstone came from Israeli politicians. In fact, it is clear that little if any of Goldstone is based on such comments except for the determination of the role of politicians in decision making and the complicity of the Israeli government from the top down. Goldstone and his team went to Gaza. He wanted to interview IDF and visit Sderot, but was refused. Had you bothered to read the report you would know this.
Iraqi Kurdish leader vows to take Sinjar from ISIS (AP)
from the article: Herzog: Israeli leaders' remarks led to Goldstone war crime accusations