This has led to "systematic and severe constraints on Palestinian development of water resources", says the report.

But the Palestinian Authority (PA) too gets part of the blame. It is struggling to establish even a basic water infrastructure and management, concludes the report.

Water supplies continue to "operate in a very inefficient emergency mode, with far reaching economic, social and environmental consequences".

Since biblical times Jewish communities lived in Arab lands, in Persia, India, East and North Africa and indeed in Palestine.