Snatch three ayatollahs. Impale two, as the proof of earnestness, and use the third one as a bargaining chip.
I like the gist of your idea, but I say snatch 100 ayatollahs, impale 99 of them, and then fire the 100ths head into Iran from a 16" rifle. After this, say we will come for the rest if they don't kowtow.