The Indus Water Treaty has survived major wars with Pakistan.

India has never violated that treaty. Even after devestating terrorist attacks from Pakistan.

The water boogeyman is only ever raised by Pakistani establishment to create fear amongst Pakistani civilians and resentment towards India.

They also tack this as one of the reasons for the Kashmir dispute despite everyone knowing that the dispute is only political.

Someone ask Pakistan what infrastructure have they built to exploit the water they already get in the last 20 years.

Answer is 0. That's why 1/3 of Pakistan was under water during recent flooding.

Their corrupt establishment will spend 0 dollars on improving their existing water infrastructure but hype up a completely impossible hypothetical scenario of India suddenly turning off their water.