> but in the modern interpretation, national law enforcers are supposed to be subject to the same law they are enforcing
That is true in the same sense for national law as it is for international law (that is, true in idealized theory, much less true in practice. Actually, its somewhat less true in many national law systems than of international law at the intermediate level between pure theory and practice of the concrete, on-the-books law, where law enforcers, especially at the apex, often enjoy on-the-books immunities from some or all of the law that they enforce.)
That is true in the same sense for national law as it is for international law (that is, true in idealized theory, much less true in practice. Actually, its somewhat less true in many national law systems than of international law at the intermediate level between pure theory and practice of the concrete, on-the-books law, where law enforcers, especially at the apex, often enjoy on-the-books immunities from some or all of the law that they enforce.)