MEMRI has posted an article detailing various accusations appearing in the Arab media of an Israeli plot to foment unrest and undermine the stability of Egypt. The target of these fabrications is former Israeli Military Intelligence chief Amos Yadlin. The MEMRI article http://www.memri.org/report/en/0/0/0/0/0/0/5815.htm titled "Fabricated Statements Attributed to Former Israeli Military Intelligence Chief Amos Yadlin Cited as Proof Israel Is Behind Tensions between Egypt's Copts, Muslims; Antisemitic Cartoons Portray Jews as Being Behind Bombing of Coptic Church" describes alleged Israeli machinations including bombing a church in Egypt.
According to MEMRI the source of the fabrications is the Lebanese weekly Al-Thabat, which is associated with Hezbollah. From there the conspiracy rumor mill spread the story to other Lebanese, Syrian, Palestinian and Egyptian publications and internet sites. It has also spread to Western-based Arabic internet sites.
Media-driven conspiracy mongering is endemic in the Middle East. The image of Israel as a nefarious conspirator working against the interests of the region's peoples is strongly promoted by the Iranian regime, its agents and the Muslim Brotherhood.
H/T Camera snapshots