I actually said to my husband after the movie that there's one thing we know: Tony's not suicidal. Crazy, but not suicidal. Because if he WAS, he would have calmly taken every bit of stuff those guys handed him to make the missile, and made a gigantic fucking bomb, and obliterated the entire mountain with them AND HIMSELF inside of it. So in a way, they're lucky that he only decided to build a huge flamethrowing robot body; some of them survived.