How are you looking down on the state of their homes and not feeling shame. Please correct that. You know before Israel came along, destroyed much of Palestine, drove out Palestinians to live as refugees in a tiny area of their original land or in other countries (or killed them). And continued to terrorise them. They used to have houses and land. Like actual houses.
And if it is illegal (which I haven’t verified) what would you have them do when Israel doesn’t give them permission to build a water source? Do you really want them to just be like oh, our source of life for us and our children is illegal, let’s just die?