Although his reply lacked tact but he did not threaten Israel - he merely was reminding that with Pak having nukes as well, threatening nuclear attack was not a good road to go down. Although your right he should have first confirmed this before his fingers got the twitch. However nukes are in direct control of SPD and any use of such weapons would require NSC clearance.
The defence minister does not have his finger on the trigger - so everybody relax. That media house that reported this needs sorting out. Such irresponsible and down outright lies are dangerous - with millions of Muslim radicals running rampant we don't need to give them excuse to jump around crying for 'nuclear jihad'.