This story doesn't mention that Walker had learned about Islam at his local mosque, or that the Somali group is a jihadist one. He sounds like a type of alienated kid that has become distressingly common in America — one who can easily be exploited by people who offer him a cause, such as jihadists. More on the [1] Mark Robert Walker story, from [2] AP, with thanks to Twostellas:

STANWOOD, Wash. (AP) -- A teenager accused of planning to supply a Somalian terrorist group with night vision goggles and bulletproof vests foreshadowed the charges in his high school yearbook with a note that mentions Somalia in his "plans for world supremacy."

Mark Robert Walker, 19, was arrested Nov. 6 in El Paso, Texas, and on Friday was charged with attempting or conspiring to contribute goods or services to a global terrorist organization. A more serious charge filed earlier was dropped.

Months earlier, Walker caused a stir when he left a cryptic note next to his senior portrait in the 2004 yearbook, writing that his "plans for world supremacy are in order. They entail taking over Somalia and working outward, but I should not divulge the exact details of my cunning strategy."

The entry also referred to Walker's "future heroic death" and offered a "death poem" with imagery of a grenade exploding and the phrase "all shall pass this world."