For instance, I have an aunt who is definitely MAGA, and is flirting with Q-Anon ideas. However, she has pretty good views on the environment and animal rights. For instance, after travelling to Ecuador, she donates to some Ecuadorian land trust run by locals. However, if you start talking to her about the border or gender, she goes full Orbán.
It means they've fully converted to Christianity. In his mind it means that they've fully submitted to Western culture and therefore should no longer be considered indigenous. The idea is to integrate them through religion but it's obviously a loose excuse to allow pencil genocide.