From what I could gather, the idea they're promoting is for whites to have a separate society, and not dominate anyone. But since they're so open about promoting, as you say, whites dominating others, you should have no trouble finding an example proving me wrong.
I know I'm not going to convince you - but for others who aren't radicalized, I'll spell it out - the idea of a white ethnostate is a hateful, racist one. Promoting that idea means you're hateful and racist. Do not read American Renaissance.
Amren posts articles like this: https://www.amren.com/news/2008/08/race_and_psycho/ that the core argument is that we should kick blacks and Hispanics out of society because they're stupider than white people. Supporting this makes you a bad person. This is not just "political differences" - this is doesn't belong on any platform.
Surely you mean any ethnostate is hateful and racist, not just a white one? Such as the hateful, racist states of Algeria, Japan, South Korea, Taiwan, Thailand, Vietnam, Finland, Sierra Leone, Lithuania, and Turkey? All nearly homogeneous at the granularity where 'white' is a single group.
Have you ever considered that movies and media might be deceiving you?