Pete, it is justified scholastically because mainstream scholars have never accused Anthroposophy of being founded on rascist principles. Mainstream encyclopedias never accuse Steiner or Anthroposophy of rascism. Here's what Wikipedia has to say about it:
"In other words, views held only by a tiny minority of people should not be represented as though they are significant minority views, and perhaps should not be represented at all.

In particular, to elaborate on the last comment above, if you are able to prove something that nobody currently believes, Wikipedia is not the place to premiere such a proof. Once a proof has been presented and discussed elsewhere, however, it may be referenced."

This is why I believe that the section on racism should not be a section. A mere couple of sentences is, in my opinion, too much, but I would be willing to compromise with that. Because the presence of race as a section on Steiner's page gives the article undue weight.