More bloodshed is certain to ensue. Calling the struggle (jihad) to overthrow the regime an "obligation" is to put the conflict in specifically Islamic terms: jihad becomes obligatory on every Muslim if a Muslim land is attacked. That is how the Brotherhood is framing its removal from power.
"More clashes feared as protesters vow 'Friday of anger' in Egypt," by Reza Sayah and David Simpson for CNN, August 16:
Cairo (CNN) -- As Egypt faces the gruesome aftermath of clashes that left hundreds dead, demonstrators plan to defy an emergency order and take to the streets to mark "Friday of anger."
The Muslim Brotherhood promised huge protests, and Egypt's military government showed no sign of easing its crackdown, setting the stage for what could become another catastrophic encounter of security forces and protesters.
"The struggle to overthrow this illegitimate regime is an obligation," the Muslim Brotherhood said on its website Friday, while urging people to protest peacefully....
...and maybe burn a few churches.