Extremism in the armed forces: what is to be done?

Howard Altman of the Tampa Bay Times has written a smart article about the quandary posed for the armed forces by racial extremism in the ranks. Is a database of extremist tattoos the answer? Excerpt:

Military regulations prohibit personnel from “actively advocating supremacist, extremist, or criminal gang doctrine, ideology, or causes.” But enforcing this proves a challenge.

“Mere membership is not precluded,” [DoD spokesperson Major Carla] Gleason said. “The policy is a delicate balance between constitutional freedoms of speech, associations and military requirements.”