Members of the Belgian branch of Germany's anti-Islam group, PEGIDA (Patriotic Europeans Against the Islamisation of the West), take part in a demonstration in Antwerp, March 2, 2015. Germany has experienced an upsurge of anti-Islam sentiment in the form of weekly PEGIDA protests in Dresden. REUTERS/Eric Vidal

Ilyas Wadood (right) of the Islamic Community Center talks with a demonstrator during the "Freedom of Speech Rally Round II" in Phoenix, Arizona May 29, 2015. More than 200 protesters, some armed, berated Islam and its Prophet Mohammed outside an Arizona mosque on Friday in a provocative protest that was denounced by counterprotesters shouting "Go home, Nazis," weeks after an anti-Muslim event in Texas came under attack by two gunmen. REUTERS/Nancy Wiechec

Iraqi security forces and Shi'ite fighters reload a weapon during clashes with Islamic State militants in Salahuddin province March 2, 2015. Iraq's armed forces, backed by Shi'ite militia, attacked Islamic State strongholds north of Baghdad on Monday as they launched an offensive to retake the city of Tikrit and the surrounding Sunni Muslim province of Salahuddin. REUTERS/Thaier Al-Sudani