Anti-American sentiment in both camps has surged here following the military takeover. At checkpoints leading into Tahrir, civilians told some American reporters that they were forbidden from entering, while pro-Morsy protesters at Rabaa al-Adaweya angrily denounced what they called a love affair between U.S. Ambassador to Egypt Anne Patterson and the Egyptian Army. Washington has treaded cautiously: On Wednesday, the Pentagon announced that it was delaying the delivery of F-16 fighter jets to Egypt, but the State Department said on Friday that it would not label Morsy's ouster a coup.
Meanwhile, Morsy, who has been held at an undisclosed location since his ouster on July 3, is facing charges of murder and conspiring with the Islamist militant group Hamas.
On Friday night, protesters in Tahrir staged a mock trial for Morsy and other Muslim Brotherhood leaders. The crowd went wild as the fake verdict was read: life in prison.
With all signs pointing to confrontation, Cairo is bracing itself for more bloodshed. In another ominous sign, an Egyptian military official speaking to Reuters gave the Muslim Brotherhood a 48-hour deadline to comply with its political roadmap -- the "or else" was left unsaid, but likely portends more violence. As night fell, Interim Interior Minister Mohamed Ibrahim said that the massive Rabaa sit-in will be "brought to an end soon and in a legal manner," noting that residents around Rabaa -- many of whom support Sisi -- have filed complaints against the nearly month-long protest.
Outside of Cairo, violence is already spiking. At least five Egyptians were killed and more than 100 were injured in clashes between pro- and anti-Morsy protests in the coastal city of Alexandria on Friday, according to the Egyptian daily Ahram. One of the victims was reportedly a 14-year-old boy, who was stabbed in the stomach. The death toll in Egypt since early June has far surpassed 100.
That fact has left pretty much everyone worried about the direction Egypt is heading.
"Violence begets violence, and should there be a violent crackdown on Islamists, they are unlikely to just sit back and take it, at least not in the long-term," said International Crisis Group Egypt analyst Yasser El-Shimy in an interview.
While many of the Islamist protesters at Rabaa Mosque are peaceful, there are those, like Khaled from Upper Egypt, who are ready to fight and die to maintain their political prominence in a bitterly divided Egypt.
"For 30 years we were slaves under Mubarak," said Khaled. "We have no fear. We will die, no problem. It will be better than to live as slaves."