even if they wanted to do that they couldn't done that, because at the time there was no delivery system for nuclear bomb in pakistan. their missiles don't even work properly. during kargil war Musharraf orders his general to launch the missile against india, but his commanders refused to do that because the accuracy of the missile systems of pakistan was worse so they fear that the missile could hit pakistani cites.
A retired Pakistani nuclear scientist has claimed that former Pakistani leader Gen. Pervez Musharraf’s 1999 military adventurism in the Kargil region of divided Kashmir failed in part because the North Korea-aided, nuclear-capable Ghauri missiles he wanted to deploy then had a faulty guidance system.
Speaking on condition of anonymity, the scientist said that during the Kargil crisis of May-July 1999, Musharraf, who was then army chief, “wanted to deploy Ghauri missiles, but air went out of his balloon when the top general in charge of the missile program told him the missile had a faulty guidance systems
Over a year earlier, on April 6, 1998, Pakistan had carried out what it described as a successful first test of the intermediate-range ballistic missile, developed by Khan Research Laboratory with North Korean assistance.
Even Musharraf, who witnessed that Ghauri launch as a local corps commander, had been led to believe it was a success then, according to the nuclear scientist, who until recently had long been closely associated with the country’s nuclear and missile programs.
The truth, he said, is that the ballistic missile failed to reach its predesignated impact point in Pakistan’s southwestern province of Baluchistan and its debris could not be found — something that would have undermined the missile’s deterrent effect if it were made public.
North's missiles tied to Musharraf blunder | The Japan Times
actually clinton saved pakistanis from indian forces... after kargil war musharaf was left with eggs in his face.