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					Originally Posted by Sidd Finch  I think that any reluctance to crush ISIS is based on the recognition that this will help Iran (and possibly Shiites generally).  It's a rationale similar to the one that led us to support Saddam for so many years.  But ISIS is so extreme, and creates such potential for triggering a much hotter and more intense war if it gains more power and territory, that even the Saudis have to look at them and say "whoa, we may be crazy, but those muthafuckahs are REALLY crazy and we don't want to be like them."  (This is how San Francisco looks at Berkeley from time to time.) | 
	
 ISIS' stronghold in the wastes of the Syrian dessert is a fine place for everyone to let not just Iran but also the US keep busy and out of their hair.  
Sure, let them fight over Raqaa. Meanwhile, no one will really miss Yemen, and Saudi Arabia could nearly double its population and get some fertile soil and a pretty good port.  And, as a bonus, the place has been a total magnet for crazies!