> If OTOH your neighbour is a Christian and your cousin is married to a Christian, you're going to feel a whole lot more charitable towards Christians when push comes to shove.
FWIW, don't rely too much on it, at least as far as neighbors go. There are numerous examples to the contrary during Balkan wars, and various ethnic conflicts that happened when the USSR was collapsing. For example, during the Armenian-Azerbaijani conflict, which involved numerous ethnic cleanings by both sides, one thing that stood out from the surviving victims' reports was that it was often their neighbors, with whom they were on good terms, that led the marauding parties to their house to ransack it and drive them out or kill them. Similar reports have been heard from Kurds and Yazidi in areas of Iraq and Syria captured by ISIS.