Totally different. This is a multi-way religious war with Sunnis and Shias taking sides, and then Jews and Christians piling in. And on top of that is oil and nuclear weapons.

Iran has been kept destabilized by the rest of the world for the past 50 years because it brings stability to the rest of the region. KSA, UAE, Oman and Qatar are all quite happy to have Iran playing defense, as is Pakistan (traditional Persian lands and culture overlap most of the current national boundaries).

The main players in the Middle East have been fighting for the last 3,000 or so years, and it hasn’t been a cold fight. The US is traditionally willing to pour just enough weaponry into the area to keep things off balance.