Ok, actually it was the National Congress of American Indians on behalf of the Seminoles, see Miami Herald story here. This statement in a government CMCR brief, that argued material support for terrorism is a historically recognized crime at military tribunals, unsurprisingly ruffled a few feathers,
Examination of [the case of two Seminole War military commission accuseds] reveals that their conduct was viewed as wrongful, in that they were assisting unlawful hostilities by the Seminoles and their allies. Further, not only was the Seminole belligerency unlawful, but, much like modern-day al Qaeda, the very way in which the Seminoles waged war against U.S. targets itself violated the customs and usages of war. Because Ambrister and Arbuthnot aided the Seminoles both to carry on an unlawful belligerency and to violate the laws of war, their conduct was wrongful and punishable.