I believe Israel is saying the UN are not doing their job as efficiently by delivering aid to all parts of Gaza
The UN is saying that there isn't enough aid being allowed in and that despite what is allowed in, the intense fighting and bombardment means that it is extremely dangerous and difficult to navigate the huge task of being able to do their job
There has already been more than a 100 UN workers killed in Gaza so I think they have a fair point
The BBC said that from Sderot in Israel they could see the intense continuous bombing in Northern Gaza and at times even feel the pressure waves from the impact
I can't see how in such conditions its possible for them to deliver aid there
I'm not saying who is and who isn't to blame for it but just to highlight the severity of the situation on the ground in Gaza, which has a dire impact on those trying to carry out these dangerous yet life saving tasks and it may come to a point where the UN can no longer carry on doing so