I hope you are aware of a present day nuke radius & power, its 1x 1000x Hiroshima.
Even if you destroy whole India, imagine where will jhelum rather whole Punjab go. Evaporate.
An urdu saying. Pehlay tolo phir bolo. ( Think before you talk).
Nuke talk is an uncivilized word in civilized world, only if Pakistanis know that.