Are all cultures equal in moral value and societal outcomes?
The UK maintains official multiculturalism, granting legal protections to diverse cultural and religious practices while expecting adherence to core values like equality before the law and individual rights. Debates intensify over practices in some communities that conflict with these, including forced marriage, female genital mutilation, grooming gang scandals disproportionately involving certain ethnic groups, and survey data showing divergent attitudes on issues such as antisemitism, homosexuality, and free speech. High net migration has amplified questions about whether all incoming cultures strengthen or strain social cohesion.

9 Opinions
One of the cultures that results in poor societal outcomes is the one that says your colour matters more than your character. Thanks, identitarians.
Secular humanist cultures that allow us all to flourish are the ideal. Where cultures do not value all humans equitably, and are sexist, homophobic etc, then they have less value. Afghanistan's Taliban culture for example, or the IRGC in Iran. Cultures that support FGM, child marriage or hanging protesters. And cultural sensitivity should never trump human rights
While we can respect other traditions in their own countries, any Culture that does not value all humans equally regardless of what we would term having protected characteristics, is not democratic, or uses religion to make laws, is of lower moral value than a secular humanist Culture which places human well-being and flourishing as a basis for its moral code. There are Cultures in the UK that are inferior in this regard eg Far Right or Religious fundamentalism.
cultutures develop over many years in societies. Fast expansion of fairly recently arrived cultures in a society is bound to create opposition. It took a hundred years of violence to convert English to Christianity in 6th century and 1500 years on we still include many pagan cultural traditions.
Culture develops in response to societal pressures. Many cultural practices considered disruptive in the UK make sense in situ- for example, some cultures that practice FGM do so to avoid daughters being married off young. However, when these societal pressures no longer rest on people's shoulders, the less ethical practices should be left behind.