There are plenty of non-african americans in NPHC organizations (Eleanor Roosevelt is a long-time member of Alpha Kappa Alpha). This isn't a recent trend, but has been the case for 30 plus years.
Why is the fate of this fraternity based upon this ONE African American male? I think if people didn't spend so much time putting on a dog and pony show of their minority members (i.e. Hey, we've got ONE minority...now we are DIVERSE!), and just went on about things "business as usual" (i.e. letting your record of service, sister/brotherhood speak for itself), then maybe more minorities would feel more
CONFIDENT about joining a NIC/NPC organization (and not feel like an interesting piece of furniture).
I say CONFIDENT because in general, people are ALWAYS going to have something to say about what you do.
You can't run you life on the opinion of others. To me personally, he seems to have such a laisez-faire attitdue towards the whole thing so I don't think it was that important to him to join this fraternity anyway.