@trafficnab You are right, using incendiaries and ground-launched incendiaries in areas full of civilians is in itself a war crime under international law.

But white phosphorus sticks to human flesh, cannot be extinguished, and burns right through to the bone. (This is one of the main reasons human rights organizations often call for it to be much more highly circumscribed).

Doing this to civilians (whether few or many) on purpose would be a war crime whether it was an incendiary or not.

I don't think it's a conspiracy to characterize the use of this substance in a built up area as reckless disregard for civilians.

I've obviously taken it one step further in my statement above because I do think that the pattern of reckless disregard for human life that has been demonstrated in this conflict amounts to a deliberate inclusion of civilian targets. To me that doesn't seem like an unreasonable inference; YMMV.