The US simply could NOT get involved unless you want to bring your "what if" scenario back to before the first gulf war. We were involved, the only other option was containment. Look at N. Korea to see how that is working 60 years later - 30,000 US troops on the border forever and still a madman and his pups in charge.
But anyways, ask in about 20 years, things are still playing out. Plus you will just get too many subjective politically motivated responses.
Also - THIS IS A DUPLICATE THREAD/TOPIC:
//www.city-data.com/forum/histo...erica-not.html