Wikipedia policy also requires a "sympathetic" treatment of subjects, in addition to a "neutral" one.
Wikipedia does not have a sympathetic point of view policy. Now, your views should definitely be represented in the article, but so should those of your opponents. I haven't looked at the article in question but as long as you're only adding accurate and attributed information about the views of white nationalists you should be fine. On the other hand, deletions of criticism or insertions of unverifiable information are likely to be deleted.
moink