egypt has transformed its soldier to militant to try to kill 2 israel soldier so it is their karma from KSA fighter jihadis , when you do something bad it turns on you , that is the karma for anyone who does evil

Does this mean no building supplies get into Gaza?

Egypt problem is mainly because we are fighting militants that hide between civilians. Since the sign of Camp David accord the relation between Egypt and Israel is considered normal I’m not sure why some people from Israel seize any event to start blaming Egypt. The elephant in the room is the Israeli withdraw from Gaza that created a militants heaven on earth.

al-sisi is fighting Islamic terror both in the sinai and on the border with lybia. ever since obama helped overthrow the secular qaddafi, lybia's huge weapons storage facilities were left unguarded and open to looting by al qaeda and other jihadists close to al qaeda, including the muslim brotherhood.