Uh, are we unclear on the concept of ethnic diversity? Diversity, in case you're interested, means:
1. the state or fact of being diverse; difference; unlikeness.So, if you're being accused of homogeneity, then you aim for mixing the groups, as in diversifying them.
2. variety; multiformity.
3. a point of difference.
Or, if you're developing a show where you want conflict, then you aim to fan the fires of racism for ratings.
Note of course, that the article about the CBS show is on the ABC News website. It could all be a hoax.
I'd actually prefer that version of reality.