On the page 48 of this document
EXAMPLES OF TERRORISM AND/OR TERRORIST ACTIVITIES
3.18.1 destruction of aircraft or aircraft facilities
3.18.13 damaging a protected computer used in interstate or foreign commerce or that is used exclusively by a financial institution or the United States Government
3.18.18 damage to Government property
3.18.19 destruction of communication lines, stations, or systems
Well, AFAIC under these definitions the IRS are terrorists.
3.18.29 the use of weapons of mass destruction
3.18.34 harboring TERRORISTS
3.18.35 providing material support to TERRORISTS
3.18.36 providing material support to terrorist organizations
3.18.37 financing TERRORISM
3.18.38 receiving military-type training from a FTO
3.18.40 developing, transfering, possessing, or threatening to use atomic weapons
3.18.46 manufacturing, distributing, or possessing controlled substances intending to provide anything of pecuniary value to a FTO, member, or group
Under these definition USA government is a terrorist organization.