If Pakistan has 200 warheads on par with North Korea (250-300 kt). It can single handed up detonate 50 megatons on India. The fires that will cause will have global ramifications.
Trust me, if Pakistan did not have a powerful nuclear deterrent, what happened to the Iraqis, afghans and Syrians combined would pale in comparison to what would happen to Pakistan and Pakistanis. Also we would cease to be Muslims and end up looking like dravidian gangus.