CAIRO — The sounds made lately by curfew violators here are mostly not shouts or gunshots, but the clacking of dice on wooden backgammon boards, the clicking of dominoes on cafe tables crowded with hookahs and grumbling fueled by years of upheaval.

When the conversation turns to politics, the predominant topic is a surprise to American ears: the conspiracy between the United States and the Muslim Brotherhood to destroy Egypt.

However crackpot that view may sound, it is widespread among supporters of the military, which ousted the Muslim Brotherhood’s elected president, Mohamed Morsi, last month.

For journalists who ventured out Saturday night in violation of the curfew, the biggest danger was not from police officers and soldiers at checkpoints, but from angry men with a chip on their shoulders and a grudge against Al Jazeera, the Western press and America.