I'm actually with Mirra on this.
There are few good reasons to ever refer to someone with a casual attributive adjective to their skin colour or ethnic origins.
Outside of deliberately malicious and outright racism, here in the UK it's grammatically a bit lazy for a start, almost a glottal stop that reflects a carelessness of thought or barren intellect and consideration for the sensitivities of others that as we now see, can too easily be interpreted as an insult with racial overtones with all the complications and polarisations that result.
However, it's fair to say that other cultures have very different sensitivities and linguistic nuances that while seeming odd to us simply must be taken into account but with scrupulous integrity and balance and with no suggestion of a hidden agenda in order to achieve a truly fair judgement.
I'm unsure and uncomfortable that this has been the case here, evidence of hypocrisy by the FA and others involved in this particular case in previous judgements give me little reason to have faith in their particular findings.
This is about two foreigners from different cultural and linguistic backgrounds having a private slanging match no one else heard though in a public place here in the UK and in a foreign language so veracity, context and intent are all, but we won't know this in detail until all the evidence to reach the conclusion has been shown.
Then, and only then, will it be time to reappraise and either accept this judgement and modify behaviour accordingly, or bring big guns to the fight and appeal the judgement.