[frgoff]

Now, if new species are only created by "Intelligent Design", why would there be this association?

Because the tendency is toward extinction except where biodiversity is sufficient to support hightly specialized niche organisms.

The Robber fly exists only in the Canary islands because it died out elsewhere due to lack of biodiversity, not because it was formed because of abundant biodiversity.

High biodiversity generally indicates an abundance of resources. An abundance of resources means competition for survival is low.

You see, it all depends on your initial assumptions. The follow up studies would now call for experiments to substantiate one hypothesis over the other.

Of course, that won't happen because of paradigm lock.

[stremba]

The Robber fly exists only in the Canary islands because it died out elsewhere

And your evidence for this assertion is...?