It's just a rip from the article, which is terribly written and fails to provide a lot of context. My initial opinion was this was a stitch up and the hacker was just against the war and people were stretching connections and definitions to make them sound like a security threat. This ComputerWorld article is way better at providing the details that link this worm to previous efforts by a Libyan hacker to create a politically motivated hacker group. To describe these guys as anti-US would be, I think, a simplification of the motivation of these groups. Jihadists (and here I also probably simplify) may be prepared to attack the States, but the motivation is not simply anti-US. I found this article on Eurozine to be really interesting on breaking down their attitudes.