Jon Stewart used the N-word quite openly in his piece about Dr. Laura. He used it in a context of discussing its impact and the reactions to it.

If the people making this video had just skipped the part where they gleefully chant it over and over again at each other, they’d be using it in the same context. Although, I would find it odd that they’re saying nobody should ever say it while saying it. I thought pastors were supposed to not do the things they say people shouldn’t do, not serve as counterexamples to their own exhortations.