Famous first words

“The U.S. government has consistently blamed me for being behind every occasion its enemies attack it.

"I would like to assure the world that I did not plan the recent attacks, which seems to have been planned by people for personal reasons.”

See also here and here.  The whole point of a terrorist attack is to associate an attack against civilians with a political complaint made against the country in which those civilians live.  Failure to take immediate credit for such an attack defeats the whole purpose for the attack.