Anyone who thinks Tony Stark is or has ever been a pacifist has a seriously screwed up understanding of the word
A pacifist, by definition, is someone who refuses to bear arms because of moral or religious reasons. A pacifist will reluctantly use force only as a last resort in self defence
Tony Stark owns a company that made weapons for years! He dons a big bad suit of futuristic armor and pounds people into submission with advanced weapons of his own design on a daily basis
come on people Stark is no pacifist