It is hard to read the Goldstone report, it is so full of sad facts. What strikes me most in the report is the search for proven facts, respect for civilian rights (everywhere) and the rule of law (everywhere). The people attacking the report are very soft on facts and high on emotion. The text you cited is a prime example. If you read the report you see Goldstone is not soft on Hamas.
Woman moderately wounded by firebomb thrown at her car in north J'lem (Haaretz)
from the article: Barak 'incensed, but not surprised' by Goldstone report