Who is "they?"

Belmont Club:  In the aftermath of the Times Square attack President Obama warned against the threat from “they”. “Around the world and here at home there are those who would attack our citizens and who would slaughter innocent men, women and children in pursuit of their murderous agenda … They will stop at nothing to kill and disrupt our way of life.”

We know that the aim of those who try to carry out those attacks is to force us to live in fear and thereby amplifying the effects of their attacks, even those that fail … But as Americans, and as a nation, we will not be terrorized … We will not cower in fear. We will not be intimidated.

That may confuse some readers because Faisal Shahzad, according to the Globe and Mail, was “an ordinary American”, no different from anyone who might live down the street. Logically, he must be part of the “we” and not party of the “they”.