It's omerta, "brotherhood", teflon-coating and insitutionalised victim-blaming that are the problems.
^This
I don't condemn any group I condemn the practices of individual groups based on the above.
No group is perfect, no group is infallible.
It is widely known in the US that there are many groups that treat girls/women as subhuman from the very wealthy to the poorest of poor. Many are religious, some are isolated in Appalachia, some are cults, some are rich and affluent, and some are right next door. What is important are the victims not the groups they reside in/indoctrinated/trafficked into.
If we don't discuss the examples we are able to access how do we help those that are the most vulnerable? Dismissing real life examples only helps the perpetrators and further damages the groups/communities.
In regards to Native American people (I can't speak about indigenous peoples outside of the US as I don't have the knowledge) there is an epidemic of abuse, rape, murders, police brutality, and so much more that these communities suffer not from the inside but from the outside. FWIW the tribal laws are fairly strict and no nonsense but being mostly isolated/insulated from the US judicial system has pitfalls. There is rape and DV within these communities as well - they are not unique and no worse or no better than any other community in that respect. There is a failure in the tribal judicial system that mirrors the US judicial system - women/children are expected to feel safe and live on in communities where there abusers have been reintroduced post punishment or where the abusers never left and just got a slap on the wrist. These women and children are failed at every turn - they don't get what they need and have no recourse as they exist outside the US judicial framework (not that the US judicial system would provide any real help but not having access in most cases compounds the problem). But again, in most cases the perpetrators are non-native which further complicates prosecution as tribal law does not cover non-natives so it is few and far between that these non-native offenders see any retribution for their crimes.
Epstein, and the global group of pedophilic perverts that abused socio-economically challenged teenage girls is the most recent enormous scandal and it is mostly off people's radar without any answers or support for the victims. They (the victims) have been mostly forgotten.