I never said it was conducive to nation building - that is an entirely separate argument. 
I did, however, point out that we cannot start using phrases like this on any platform, as context remains key - in the context the court made its ruling, namely that it was a work of art, it clearly does not constitute hate speech. If someone were to shout it out at a political rally or on Twitter, it may very well be considered hate speech.

There is a huge difference between being offended by something and it being deemed hate speech.
I was offended a few months back when one of the FeesMustFall protesters was seen wearing a T-shirt displaying that exact same phrase multiple times, but I would still defend their right to wear it.

As the saying goes: "You do not have a right to not be offended".

The right to freedom of speech is probably the single most critical right we have - it cannot simply be the freedom for people to only say the things we agree with.