While most of the world celebrates the U.S. military operation that killed al Qaeda leader Osama bin Laden in Pakistan, the sentiment is not unanimous. In the Gaza Strip, Hamas leader Ismail Haniyeh has condemned the United States, accusing Washington of assassinating a “Muslim and Arabic warrior” and the “continuation of the American oppression and shedding of blood of Muslims and Arabs.”

Haniyeh’s reaction underscores the ideological roots Hamas and al Qaeda share: Hamas was founded by Sheikh Ahmed Yassin, a prominent Palestinian Muslim Brotherhood figure; al Qaeda was cofounded, along with bin Laden, by Abdullah Azzam, another prominent Palestinian Muslim Brotherhood figure.