The attacks came months after ISIS vowed to eradicate Christianity from Egypt, which comprises about 10% of the population.
Only low-key church services are expected to go ahead, under armed guard.
One Egyptian Christian says the community is scared ISIS will carry out another attack on Saturday night as the main Easter services start.
“We do have strong concerns especially Saturday evening when the main Easter service starts and ends at midnight. It is one of the most heavily attended services of the year,” he added.
Egyptian president Abdel Fatah el-Sisi declared a three-month state of emergency following the Palm Sunday attacks, deploying the military across the country and restricting freedom of movement in an effort to protect Christians and “vital and important infrastructure,” and halt further ISIS attacks.
“I ask Egyptians to bear the pain,” el-Sisi said, warning that the war against the jihadists would be “long and painful.”
The anonymous Christian pointed out that “much of the population is either illiterate or very poorly educated,” which are ideal conditions for ISIS to recruit new jihadis.
“Christians are considered infidels, following a corrupt faith, reading a corrupt bible,” the Christian said. “They will blindly follow teaching of those who uphold the conception that Christians are infidels.”
Some Christians are set to defy the intimidation and attend more subdued and limited Easter services with armed guards and “without any festive manifestations.”
“Christians are considered as infidels, following a corrupt faith, reading a corrupt bible. A second aspect to consider is that much of the population is either illiterate or very poorly educated. They will blindly follow teaching of those who uphold the conception that Christians are infidels.”
It comes as Egypt’s interior ministry on Thursday identified the suicide bomber in the church bombing in the city of Tanta as Mamdouh Amin Mohamed Baghdadi, a resident of Qena, south of Cairo.
A ministry statement said Baghdadi was born in 1977 and was one of 19 suspected militants believed to belong to a cell behind a December suicide bombing of Cairo’s main Coptic cathedral, another attack claimed by ISIS.
The statement said the authorities had arrested three of the 19 suspected militants in the cell