https://www.npr.org/2025/06/28/nx-s1-5449587/israel-gaza-haa...
The most obvious problems are that the food distribution centers are placed deep inside military red zones (which is not common practice), and that Israeli soldiers have been ordered to fire at civilians in those zones, even if they obviously pose no threat (which is clearly a war crime).
The sections "Troops describe firing at crowds of aid seekers" and "Aid workers and medics call for end to GHF distribution plan" explain in more detail.