HRW report
The report is here.
It's worth reading, and not surprisingly, more balanced than the press accounts would have you believe (which is not much).
Note the methodology section, relying heavily on eyewitnesses from scenes HRW could not visit.
IDF has shown film of rockets being fired from Qana. The use of that city as a Hezbollah attack source is indisputable.
In this war, many of the "civilians" are terrorists who don't have a weapon at the time. It is also indisputable that Hezbollah fights from civilian homes, and in civilian clothes. There are photos and film of that, too, which holds a little more weight than an "eyewitness" declaring that Hezbollah has never come within miles of a place.
on-site investigations did not identify any signs of military activity in the area attacked, such as trenches, destroyed rocket launchers, other military equipment, or dead or wounded fighters.
Hezbollah does not dig "trenches." Launchers for all but the largest rockets are portable, and quickly removed from the scene of an attack. I would love to know how they identify a dead or wounded "fighter."
The IDF is not the one "blurring the distinction between civilian and combatant."
It would take me days to completely comment on this report, but much of it is based on the theory that if villagers tell you something fervently enough, it must be true.
Oh, and by the way, out of 51 pages:
While not the focus of this report, Human Rights Watch has separately and simultaneously documented violations of international humanitarian law by Hezbollah, including a pattern of attacks that amount to war crimes. Between July 12, when Hezbollah captured two Israeli soldiers and killed eight, and July 27, the group launched a reported 1,300 rockets into predominantly civilian areas in Israel, killing 18 civilians and wounding more than 300. Without guidance systems for accurate targeting, the rockets are inherently indiscriminate when directed toward civilian areas, especially cities, and thus are serious violations of the requirement of international humanitarian law that attackers distinguish at all times between combatants and civilians. Some of these rockets, Human Rights Watch found, are packed with thousands of metal ball-bearings, which spray more than 100 meters from the blast and compound the harm to civilians.
Note this paragraph in light of the discussion in the section "Applicable Law."
Now, back to Israel's abuses...