I do not disagree with anything you said, but I do believe HRC's position was to hold manufacturers responsible anytime there was a murder.Eye,
You're arguing the merits of the lawsuits. That's not my point at all, and frankly, it's not even HRC's point.
If you want to discuss the merits of the lawsuits, that's fine. However, I take off my POTUS hat and put on my state legislator or state supreme court justice hat to do that, because that's who should be making the decision.
If we're talking about cases in which someone murders another person with a gun that was legally purchased by the murderer, then no, there shouldn't be any lawsuit against the gun manufacturer or seller. To be honest, I don't know that anyone has called for that.
What fact scenarios make a lawsuit more justifiable? If the murderer was legally prohibited from having the gun, I think a lawsuit against the person or entity that provided it to him is perfectly fair. (That would be pretty analogous to negligent entrustment cases involving automobiles. If you loan your car to a person you know to be unlicensed or incompetent to drive (drunk, etc.), you can get sued.)
If some defect in the gun causes it to injure someone (explosion, firing without the trigger being pulled, perhaps even failure to fire when the trigger is pulled, etc.), I think a lawsuit against the manufacturer is fair game. That's a basic products liability cases - similar to a case against an auto manufacturer when a gas tank explodes upon a minor impact collision or a seat belt fails.