The only one confused here is you. The goal is to enable military operations against Iran. That's why those bases exist in the first place. These troops are part of the war of aggression, and whether they have an offensive role or not is utterly irrelevant to the discussion. To put it in terms you might understand easier, if you're a getaway driver for a bank robbery, you can't use that an excuse to claim that you weren't part of the robbery.