Supporters of the Islamic State—formerly the Islamic State of Iraq and al-Sham (ISIS)—have taken to Twitter to support and celebrate the group’s announcement of Caliphate.

In his first message as Caliph, Abu Bakr al-Baghdadi highlighted an overlooked danger that foreign fighters pose to their home countries.

The Islamic State of Iraq and Sham (ISIS) has declared a Caliphate in the territory it claims to control.  The leader of the group, Abu Bakr al-Baghdadi, has taken the title “Caliph Ibrahim” and, henceforth, ISIS will be known simply as the “Islamic State.” This is a momentous occasion for the jihadi-salafist movement, since the creation of a Caliphate is one of the stated goals of extremist groups around the Muslim-majority world.

Islamic State of Iraq and al-Sham (ISIS) spokesman Abu Muhammad al-‘Adnani’s 34-minute speech titled “This is the Promise of Allah”—which declares ISIS as Caliphate under the name “Islamic State,” along with ISIS leader Abu Bakr al-Baghdadi’s status as the Caliph—has reignited the recently quieted conflict between ISIS, al-Qaeda (AQ), and AQ’s Syrian branch, al-Nusra Front.

Pro-Hezbollah forum members debated the effects of the crisis in Iraq and its potential spillover into Lebanon. In a thread entitled "The Danger That Has Struck Iraq Will Threaten the Neighboring Countries and Especially Lebanon," started on June 12, 2014, forum member Seraaj al-Janoob referred to Former Lebanese Foreign Minister Adnaan Mansour’s statement on the situation in Iraq, warning "of sleeper cells, and their support basins, that suddenly awaken to cause a destructive effect on the ground."