Peaceful coexistence is one of those things where its desirability to society goes beyond personal preference. Not saying that there is no cost that is too high to pay for coexistence. However, in general "but they don't want to coexist" is a sign to look for ways in which that want itself might be fostered and differences reconciled, not an argument to let people hate each other to their heart's content. At least if you consider human life valuable, or, in modern nuclear-capable times, prefer the survival of the species to its potential extinction.
That said, I would still trust someone trying to reform that from within to be more likely to get it right, rather than people who have never lived in that society, and comment on it one way or the other in a programming forum (such as, particularly, myself).