Why did Israel keep the Golan Heights so long?
before the long discussions start. The diverting of water by boring and tunnelling is on record, it changed the path of water in favour of Israel.
The river Jordan is reputed to be a trickle of it's former self.
Culture may be the statement for dispute but water figures pretty large in a lot of those disputes.
The other factor is the rising sea levels due to global warming and the diminution of the coastal areas.