Why do white supremacists usually ignore the existence of indigenous peoples?

Usually i find white supremacist post in internet, posts or comments, and i noticed that they ignore the existence of indigenous peoples.

For example, they speech so much about the prejuidces they have about blacks, menards, mexicans, jews and mixed people, but they almost no speech about prejuidces they have to indigenous populations.

They usually refer to non-white people as "invaders", "colonizers" or at least and always as "immigrants", but, what about indigenous population? At least in Europe it has sense, but outside Europe it doesn't.

They usually comment how white people is a "minority" in the context of world population, but don't they forget that indigenous people is like 1% of world population?

Why do they ignore or skip about indigenous people?