They’re all to blame, Democrat and Republican-e leaders. The writer, ironically, names only George Bush - while talking about the Libya invasion and arms running to Syria, all of which happened under Obama. But the Iraq invastion and Libya invasion were two peas in a pod — both were part of the idea that the US needed to “liberate” the middle east from dictators who just happened to be keeping a lid on all the crazy jihadis. Bush started the policy; Obama continued it. And now, they’re trying to do the same thing in Syria by ousting Assad.
Actually I think Carter started that policy when he supported the overthrow of the Shah of Iran.