Brian, I understand the problem that you are concerned about. I do not think Nick should be attacked for believing in a religious philosophy which has unusual ideas.
But I am a bit confused here, Brian. Would you support giving equal access, on this website forum, to a religous philosophy which openly supports the principle of racial superiority ???
I quite agree with the concerns, and certainly one area I can't provide tolerance for on the forum is outright racism and similar prejudices - neo-fascists do not last long here, as I'm sure you're quite aware.
However, so far the impression I've been given is that Theosophy follows a typical syncretic pattern of claiming a superior understanding over proceeding belief systems, continuing a pattern with respect to Judaism that we see in Christianity, Islam, and modern syncretics such as the Baha'i movement - all of which denigrate Jewish belief as incomplete, corrupted, or not even properly understood by the Jews.
I am also not aware of any practical expression of racism within Theosophy - when it came to accepting a Messiah in the 20th century, rather than choosing some blue-eyed blondie, they instead choose and accepted an native Indian boy called Krishnamurti.
Whether Blavatsky really was racist or anti-Semitic is one charge, but so far I don't currently see this sticking on the Theosophy society.
The Nazi's may have used Theosophy as an influence in developing their own occult philosophy, but the Nazi Party was already easily fed by existing anti-Semiticism in Austria and Germany, and the Nazis borrowed from many spiritual ideologies to justify their existing prevelant ideals - probably no better underlined by their taking of a Hindu symbol of luck, and parading it on their flags, making the Swastika one of the most hated icons of modern times.
Of course, if it demonstrated that the Theosophy Society is in fact a front for neo-fascism, and its ideology simply a device for engineering a future genocide, you can be sure I would take steps - but so far, I think allowing Theosophy to be pilloried sets a bad precedent for a project that aims to promote tolerance of all faiths.
Heck, for comparison, Asatru is a modern faith based on Nordic paganism, but I tend to find the following institutionally racist. I can still respect Asatru as a belief system, and welcome its members where they can respect civil boundaries - but those who is it to support their neo-fascist ideals would not be welcome here, not because of being Asatru, but of trying to promote hate which falls outside of that belief system in the first place.