Your sentiment is admirable, but it’s not clear to me that the USA getting involved would make things better. The track record of the US and European powers’ intervention in other cultures is checkered at best. Perhaps it would be better described as atrocious. Including, in Nigeria’s case, a couple of hundred years of the slave trade, followed by military conquest and colonialism. Admittedly, the US was only peripherally involved in most of what happened in Nigeria, but our record elsewhere isn’t good.
I’m not saying we can’t do something productive, but I don’t think that’s the way to bet.