In order to do that, Stryfe would have to have a telekinetic grip on Iron Man's body and Iron Man has shields to prevent Stryfe from telekinetically destroying his own body. See what I mean? Kind of like how Magneto ripped Apoc. in half; Magneto had to have a magnetic grip on Apocalypse's body in order to rip him in half. Magneto could not have don that just from a distance. Iron Man's shields have withstood nuclear detonations, as well.