The CIA and Pappy Bush (former head of the CIA) have been globalists all along.
Yes. Barr advocates United Executive Authority/Power, as I recall. That does not mean the President alone; it means the the Executive Branch, including its unelected bureaucrats.
He advocated Federal agents being categorically protected from the legal redress by the citizenry, again as I recall. He defended pro bono Lon Horiuchi, unrepentant de facto assassin.
Others are free to trust him. I am free not to do so. I consider him an Institutionalist, not a Constitutionalist.