Arkin's Credentials, or lack thereof

Washington Post blogger William Arkin is hardly a military "expert", according to Bill O'Reilly and NewsMax:

Among his leftist affiliations:

• The Institute for Policy Studies where he was director of the national security program and the Arms Race and Nuclear Weapons Research Project, 1981-1989. The IPS is known as a far-left Washington, DC-based think tank that describes itself as having "transformed ideas into action for peace, justice, and the environment for more than four decades.”
• Greenpeace USA where he was political director from 1989-90; director of the nuclear information unit, and director of military research 1989-94)
• National Resources Defense Council consultant to the nuclear program (1980)
• Human Rights Watch, former military consultant (1994)

All very liberal institutions which the Washington Post failed to tell us. Sounds like Arkin is a military critic, rather than an analyst.