The truth of what's actually happening is that the UN is unable to arrange "police" escorts within Gaza. If they transport the food themselves, they get attacked/raided/looted by desperate, starving civilians. So they've asked for what is essentially a Hamas escort, which has resulted in attacks on the convoys by Israel.
All of this chaos is the result of ethnic cleansing efforts by the Israeli state, mind you.
Zionists are kind of in a win/win here with this slick propaganda. Either they're setting up a trap for Hamas, or if the trap doesn't work, they get to pretend like they are benevolent and the UN is the problem.
Just do a little research when you read something weird, like the implication the UN isn't actually interested in helping.