Both sides being armed in Iraq

Iran is arming the Iraqi government and the Saudis are arming a resistance faction aligned with ISIS. The US is allied with Saudi and opposed to Iran, but is supporting Iraq alongside Iran. Confusing? Yes. Read this Debka File article. 

http://app.debka.com/n/article/24034/As-first-US-advisers-reach-Baghdad-Iranians-and-Saudis-airlift-weapons-to-opposing-sides-in-Iraq