To fight domestic terrorism or to create would be domestic terrorists? It's about PR and putting on a show so the public "thinks" (I know public and think should never be in the same sentence together) the Feds are protecting them and that there is a huge threat so they get all that funding.
its all in response to 9/11, through Congress and therefore the citizens of the USA if you need your memory refreshed, see The Impact of 9/11 and the New Legal Landscape: The Day that Changed Everything? edited by Matthew J. Morgan
Same tactics are used by the CIA to smuggle in drugs, parade a big bust for tv cameras, then rake in another $100B to continue the good fight in the War on Drugs.
