When a man is apprehended with a cache of weapons, body armor, a map of a military installation and jihadist personal effects, the natural response of most Americans is to assume the situation is terrorist-related. The Obama administration says otherwise. Lloyd R. Woodson was arrested Jan. 25 in rural New Jersey. He had been observed behaving strangely, wearing military-style fatigues and a bulletproof vest. He had a weapon modified to fire .50-caliber rounds from beneath his jacket. He had a hotel room full of weapons and ammunition. Despite all these warning signs, the immediate response from the government was that...