Buchanan simply accepts MSM propaganda about who did what. No public verifiable evidence has been presented about any of the tanker attacks nor of the last drone attack in terms of who did it. For all we know, it is a long string of false flags. The hits on Saudi were very precise, apparently they have no defense or eyes, nobody knows how they travelled or where launched, for all we know they were the work of spooks or spook aligned subversives.
As for the drones, act of war BS, etc. If the Yemeni, simple retaliation. The US just killed >30 farmers with a drone in a country where they are not at war (Afghanistan) and has killed thousands of innocent bystanders in about 37 countries in a murder by drone scheme that completely contravenes international law. There's a lot more reason to cry and holler about American drones than any other drones.