The actions of the so-called Islamic State in Iraq (IS) are sickening. But calling in the US and its allies in to save the day is like asking a pack of wolves to save you from a dog.
Recap: Since 1991, the body count of Iraqis killed by the US and its allies is in the hundreds of thousands at least, probably millions (most organizations stopped counting long ago). These deaths include over half a million young children killed by UN sanctions in the 1990s. That siege killed considerably more people than the one on Mount Sinjar today.
The complete disruption of Iraqi society by the US and its allies is responsible for creating the conditions for the IS to rise today. The IS is but one of many disgusting by-products of Western imperialism around the world, whether it identifies as such or not.
God save all people from every part of the world, including Europe and North America, from the sickness of Eurocentric colonial racism and its by-products. And God protect us from any similar illness that might eventually arise after its demise.