Hey Tom Broke-Jaw, why are they so enraged?
Ans: Many of them in the US are not enraged because they have good jobs and great businesses going.
Tamerlan was an unemployed loser, blaming the most generous nation on Earth for his own lack of success. This emptiness and anger was then filled with the Jihad fantasy, then giving meaning and power to his puny life. Strike at the decadent West, when he found that he could not gain access to it.
As Peter Jennings said of Boosh in the wake of 9-11 “Some presidents do this sort of thing well, while others (rolls eyes) do not.”
And if the UK paper has it right, it made him a member of a terrorist cell, with he and his brother as hit-men. People like him have been around forever. The Irish Fenians, the Serbian black-hand etc.