It was a large scale extremely discriminating attack, from all available reporting, right? The Geneva Conventions and ICRC documentation on IHL are online, and have been cited repeatedly on these threads; could you cite the claim you're making, just so we're all clear what it is? People might agree or disagree, but a lot of pointless flaming is driven by people that don't even agree on what they're arguing about.
4. Indiscriminate attacks are prohibited. Indiscriminate attacks are:
(a) those which are not directed at a specific military objective;
(b) those which employ a method or means of combat which cannot be directed at a specific military objective; or
(c) those which employ a method or means of combat the effects of which cannot be limited as required by this Protocol;
So far as I can tell, this strike clears all those definitions. I think you may be reading 51(4) to be a prohibition on civilian casualties as collateral to military strikes, but that obviously can't be its meaning --- that would ban virtually all air strikes, for instance, and I'm pretty sure that isn't something the victors of WW2 were going for.
Am I misunderstanding the argument you're making? It's not unlikely that I could have!
You cannot specifically target a military objective using a small explosive in a crowded area. It’s not possible other than by pure luck, which negates any assumed specificity.
The whole premise of this attack is that you can, which is what makes it unprecedented. We can disagree that it succeeded! I understand skepticism about this. I've seen the same videos everyone else has, and the explosions we're talking about are quite small, but obviously there have been civilian casualties.
I see two ways history might judge this:
1. History could decide that the Geneva Conventions and current IHL with respect to combatant status, collateral casualties, and proportionality were simply wrong, and so everything done under current IHL is indefensible. Could happen.
2. It could turn out that the military impact of this strike was dwarfed by the direct civilian cost (in deaths and injuries to noncombatants and property they rely on), which we'll know more about in the coming weeks.
Article 51(4 a b c) of Genova.
I really don't see how it can be a "discriminating" attack when they exploded in shops; groceries; family homes (in the face of a child) etc.