I would apply the same term "intractable foe" to every other person acting in their professional responsibility too: everybody has a mortgage to pay and mouths to feed. It's perfectly natural to have a strong sense of self-preservation, and by the same token many cannot have the convenience of a maintaining a clean conscience. Yes it's a cop-out and yes people like that are what's wrong with this country, but it's reality.
Not all of us are willing to sacrifice our lives for an ideological cause.