SixesAlltheway
Ancient Mariner
If you continue intervening and arming groups that are threats themselves, one day the threat might not be ISIS, but a different group. Al Nusra, for example, isn't that far from ISIS when it comes to ideologies.
We definitely agree on that. It's the Bin Laden story over again. The US arming Bin Laden to fight the Soviets just to fight him later....But with the brutality that ISIS has shown like you yourself said against..."Shiites, Yazidis, Hindus and Atheists. Also secularists." then you have to bet on a horse....The lesser of two evils.