I am going to openly state that, within Islam, ‘abrogation‘ is a disputed topic. Some Muslims reject the claim that any passage of the Qur’an has been abrogated, but, mostly, the debate is over what passages (Surahs) of the Qur’an have been replaced, and which passages replaced them. All I know is that, if one reads the Qur’an and takes Muhammad at his word (which Muhammad commands), then the concept of abrogation is in the Qur’an. All that remains is to determine which passage replaces another, and since Islam is a ‘chronological’ religion (meaning it builds from early to later), the later passages logically replace the earlier ones (which is supported by the fact that Muhammad said this is the way abrogation works). So, why is this important to understand? Because most of the passages dealing with peaceful relations toward non-Muslims have been abrogated!