//In recent years there has been many instances of Muslims protecting Christian churches and Christians in countries including Jordan, Egypt, Pakistan, Cameroon (and vice versa)//
Indeed, HC. As there were Hindus protecting Muslims, and Muslims protectng Hindus during Partition. I recall reading recently that a senior Muslim cleric provided a Schindler's Ark for Jews in the occupation of Paris. The world has decent people in it. Which is not the same as saying that all cultures, or all religions provide equally fertile soil for decency to flourish.
Back to your list of countries. Where did you hear about that? Apart from the Coptic church in Cairo which was attacked I can't remember the media talking much about attacks on churches. Not aware of a Jordan issue, but, not just in Cameroon, but in West Africa generally - e.g. Nigeria, Niger, Chad - burning churches and killing a few Christians is commonplace. Lot of it reacting to the "Je suis Charlie" demos in 2014.