I wouldn't tell them anything, you can't frighten these types of religeous nuts. Just go in and do the job. The US knows where most of the nuclear facilities are and probably knows where the leaders sleep. First thing is to take out all of the government leaders in a night strike. Destroy all govenment buildings also. Next is the military airfields and army barracks. After that the nuclear sites. That could take several days, but do the job right. AND LEAVE THE DAMN INFRASTRUCTURE ALONE!