Cultural relativism. Taken past a certain point, you have the people who say
female genital mutilation is all well and fine for this and that community,
and that we should respect their right to remove all human dignity from people
within said community that are pariahs. Relativists who are sane and who do
not deserve a good cockpunching state that there should be a set of minimum
standards past which it's ok for one culture to tell another to fucking stop
being evil. This begins pleasant discussions on essential estrangement and
what is evil anyway.