"Jihad fighters detonated the bomb as a message to all the corrupt people." Not that a bomb in a coffee shop is corrupt in any way. Coffee Jihad in Gaza. By Ali Waked in Ynet News, :
After the Palestinian branch of al-Qaeda took responsibility for killing a senior Palestinian intelligence officer and four of his escorts three weeks ago, the group again took responsibility for violence in the Gaza Strip. Early Sunday morning, Gunmen shot and set fire to an internet coffee shop in Jabaliya in the northern Gaza Strip, causing massive damage. Sunday afternoon an announcement was made claiming that the organization Islamic Swords of Justice, identified as an affiliate of al-Qaeda are responsible for the incident.
In the organization's announcement, it was stated that burning the coffee shop is "part of a series of actions aimed at fighting corruption and the corrupt. During the holy month of Ramadan, our fighters have started operating on the holy land and in the early morning placed a bomb weighing ten kilograms (22 pounds) next to the coffee shop, ridden with corruption and characteristic of the unethical activities that have increased in recent days. Jihad fighters detonated the bomb as a message to all the corrupt people."