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I believe the only solution here is to hire an independent third party that can assess the ground situation, and if they believe that its safe then team India should visit and play in Pakistan. Furthermore if team India then too refuses then ICC should heavily fine them, and lastly suspend them from the next ICC tournament to send out a strong message.
Do you really think that the ICC will suspend India from their ICC tournaments, i highly doubt that, they might levy a fine but i doubt there will be any suspension if they fail to turn up for the tournament citing security reasons.
I personally endorse this idea of suspension of BCCI from the ICC, just for drama. I'll grab the popcorn and enjoy the better drama cup lol
But hypothetically if it happens then BCCI will create its own version (ICC) of a new club and most of the cricketing nation won't mind switching sides.