If I recall correctly, the Egyptian government was quite upset when ISIL oriented terrorists killed a group of Copitic Christian men working in Libya. I was surprised since the Coptics have not always been treated well by Egypt.
Hey, those d***ed Libyans can't kill Egyptian Copts, that's our job! ;') Unlike his predecessor(s), al-Sisi has been very friendly to the Copts since he removed Iran's turd, Morsi, from power. It should also be noted that there's affiliation between the Sinai jihadists and a faction or two in Libya.