Reply #110: Some details on the discussions among Islamists about the statement:

[allemand]

Jihadist Reactions to the Claim of Responsibility for the London Attacks by the “Secret Organization of Qaedat al-Jihad in Europe”
By SITE Institute
July 7, 2005

Responding to the claim for responsibility by the “Secret Organization of Qaedat al-Jihad in Europe” for the attacks in London today, July 7, 2005, members of an al-Qaeda affiliated forum believe that the communiqué was falsified, but trust that al-Qaeda executed the attacks.

The main points of contention amongst the membership are the use of “ummat al-arab” (the Nation of Islam) in the communiqué which according the jihadists is “against the al-Qaeda beliefs,” and alleged poor Arabic that “does not sound like an al-Qaeda statement."

Further, a discussion at another al-Qaeda affiliated forum mirrors the belief that the statement is false; however, some members assert that the operation was carried out by the Abu Hafs al-Masri Brigades of al-Qaeda in Europe.

Despite the purported false claim, members still express that they are “pleased with what happened today in the home of the Roman.”
http://siteinstitute.org/bin/articles.cgi?ID=publications65805&Category=publications&Subcategory=0

The SITE institute seems to have some right-wing connections, but in this case I think that the information about the discussions appears to be plausible.