Have you noticed how many of our ‘cultural identities’ require deeply not cooperating with some specified groups, internal, external, or both?
As long as ‘culture’ is just about everyone’s peculiar traditional food and funny costume, nobody has to get hurt(and sometimes not even then: if your traditional food involves breaking my purity taboo or is made from my sacred cow, literal or otherwise; or your funny costume is deemed deeply immoral); but that’s sort of the elementary-school show-and-tell version of culture. In the wild, culture always ends up having strong opinions on cool stuff like the legitimate foundations of power, preferred allocation of violence; and similar topics that are both deeply dangerous and don’t make for good compromise material(‘we can all just do our thing in parallel’ works for holidays; not so much for codes of law).