An argument could be made that the construction materials are humanitarian in that it gets people out of leanto's and tent slums. (In a side note, Sacramento used to have the worlds largest Tent city on it's eastern side until the city gvmnt decided to start finding ways to make that go away).
And to a degree, Gaza, I think, might as well be considered helpless given that the best they seem to be able to muster is sporadic firing of rockets in the general direction of their opponent (meaning any direction but the sea). I mean when two countries go to war, and one controls total access in and out, generally the other is pretty screwed in terms of EVERYTHING. Particularly given that the Israeli version of "containment" means building a wall through Gaza territory for protection that ruins farms and they don't even pay for the land they used, and then they refuse to allow people who had been working normally in Israel to go to work through the checkpoints. Honestly if this were happening anywhere that wasn't "Woe is us, we got genocided 70 years ago" Israel, people would probably have imposed sanctions on Israel.