Ditto, in terms of my own interest, bubudi. I had a chance to talk at some length with Phil Schuyler (about 10-12 years ago) for a writing project that I was working on, though the Gnawa weren't the primary focus...
Also, as far as I know, "Gnawa" actually has multiple meanings in Moroccan usage - see some of the links I posted for that.
I think we both have major interests in a lot of things that predate the availability of articles (etc.) on the internet, but hey - there are some great sources out there! No reason not to call attention to them, IMO, anyway... And really, there's such an explosion of information from (and about) cultures that have been marginalized, like the Amazigh (or whatever other names they prefer to use), it seems a shame not to mention some of them.
I also think - as you mentioned above - that there are many complex topics that have been pulled into the discussion... none of them can be adequately covered on a message board. (I think, anyway.) And I do appreciate what you're saying regarding cultural mixing. (Very much so, in fact.)
And I suppose these posts are off-topic, but I don't see how they're problematic - real-life conversations tend to go off on tangents at times, right?

* Edited to add: there are quite a few books and articles published in the 80s and 90s that I'd like to link to, but the texts aren't yet available via the internet. I suppose that will change, given time...