...you should probably silence those doubts now.
Iran was caught shipping arms to the Taliban. Not just guns, either. We're talking heavy arms, more than 1,650 pounds of C4, advanced roadside bombs. Also seized were RPG rockets and mortar rounds. Kudos to NATO for catching this.
What's surprising is that Iran and the Taliban have never gotten along, especially since Iranian muslims are generally Shi'a, while the Taliban are Sunni muslims. However, given that Iran and the Taliban have a much bigger common cause (destroying America and the rest of western civilization)...I guess they've put their differences aside for the time being.