We should be able to use this to our advantage. An all-out war between the Sunnis and the Shias might be a very good thing for the US.
Just like with the gaza strip. Let the animals kill each other off.
Western civilization wins.
Stoke the hate and let them kill each other. Rivers of Arab blood would be a good thing.
The more I think about it the better this is. Get the US out of the major population centers and let these savages kill each other. This will be good in the long run. They will be to busy killing each other and not as many will be plotting to attack the US homeland. Meanwhile we can stay back and bomb with impunity.
Not if it interrupts the flow of oil from the region. The global economy would go down the dumper if there was any significant interruption. Russia would seek to benefit most because the price of oil would go through the roof.