A community has no moral obligation to accommodate outsiders with different values. Rather, the outsider has a moral obligation to adopt the values of the community if they want to join.
When a large group of people join a community and disregard/replace their values, that is morally equivalent to an invasion or colonization, for lack of a better term. The original community never consented to it.
When a large group of people join a community and disregard/replace their values, that is morally equivalent to an invasion or colonization, for lack of a better term. The original community never consented to it.