Even during 2006 Israel-Lebanon conflict it was cited by some hardline Sunni Muslim clerics and others writing on Islamist website.
He claims to be responsible for attacks on WikiLeaks, 4chan, Iranian President Mahmoud Ahmadinejad, and Islamist websites.
He is also said to have come to the notice of the security service, after visiting Islamist websites.
The 30-second clip, in which a man speaks in heavily-accented Hebrew, was posted on an Islamist website which contains references to Gaza.
Afterwards, Redeker received various death threats originating from one Islamist website (where he was sentenced to death; they posted his address and a photograph of his home).
Two weeks before the bombing an Islamist website called for attacks on a list of Egypt's churches, and included the church that was hit.
An Islamist website posted a recording, in which bin Laden praised Abu Musab al-Zarqawi as a "lion of Jihad".
On September 13, 2009, an audio recording purportedly by Osama Bin Laden was released on an Islamist website.
The 12-minute audio message came out on a video posted on Islamist websites, and has been translated by the SITE Institute.
The kidnappers made a film apparently showing Bigley's killing, and the tape was subsequently posted on Islamist websites and on one "shock" site.