The problem is that as DMBM phrased it, the desire to "work on my own race" and not "give a damn about any others" is in and of itself so much "racism" and "hate" according to modern orthodoxy.
While I don't disagree with anything you said, the problem if you ask me is that there are many people out there who are "nationalists" who specialize in hating African-Americans and people of Jewish heritage or religion.
These false nationalists are in fact hate groups, and they are in fact alienated, bitter, angry losers who would unleash horrifying genocide if ever enfranchised.
The last thing nationalists need is these people, who fulfill the media type of nationalists as "hate groups" to a T, as if they're reading the SPLC reports and then imitating them.
What I like about metal is that it takes a more artistic view, which is positive nationalism coupled to other ideas, like natural selection (wolves, winter), glory of struggle, desire for more intensity, worship of infinity not safety, anti-moralism, nihilism, naturalism, monism, etc.
We don't need nationalism alone; we need a cultural restoration movement that celebrates all the good things from past and future. Nationalism alone is too limited.
On another topic, I always thought people who wanted to speak for more than their ethnic group were pricks. What the hell do I know about what African-Americans want? Until I get reincarnated as one (insert religious opinion here), I'll have nary a clue.