"Those traitors breached all the religious principles and humanitarian values," says Egypt's Grand Mufti Shawqi Allam. Egypt carried out strikes in Libya on militants officials said were involved.
Friday's deadly assault was the latest attack against the Coptic Christian minority. A 70-year-old woman who was stripped and dragged through the streets last year is pursuing justice in court.
From Egypt to the Philippines, the president's praise of despotic and brutal leaders is raising eyebrows. He also has potential business conflicts in or related to all of the countries.
Aya Hijazi and her Egyptian husband were accused of child abuse, but human rights groups called the charges specious and prosecutors offered no proof. The couple were jailed for nearly three years.
For Christians and Muslims in the Middle East, maamoul is an essential part of Easter and Eid respectively. Stuffed with date paste or nuts, this buttery cookie dates back to ancient Egypt.
The Islamic State claimed responsibility for the attacks on two packed churches holding Palm Sunday services. Christians in Egypt are a minority and have previously been the victims of attacks.
Amgad Naguib collects old ticket stubs, wigs, letters and toothbrushes that he says tell Egypt's history. "I am sure I have more dresses and hats and handbags than you and all your friends," he says.