There was a report released recently but you're not quite correct. The report said that the allegiance of the raideres could not be verified in majority of the cases. In the cases where they marked IDF as the cause it was due to the IDF picking the route or blocking their intended route. The IDF was not raiding the trucks or supporting the raiders.
Netanyahu claimed himself that Israel were providing weapons to the Popular Forces/ATF. Seemingly for the same reason they bolstered Hamas as the enemy of Fatah: the enemy of their enemy is their friend. That PF has IS connections doesnt seem to bother Netanyahu.
They are in control of many of the aid corridors especially around Gaza. Aid is only allowed through those corridors, and the PF (and other gangs) are raiding the aid trucks. Sometimes within reach of the IDF which stays passive.
Let enough aid come in, and there will be no money to be made from reselling it. If Hamas is stealing all the aid now as they claim, they will have more han enough for their forces already.
