Let’s face it; any officer worth his salt should recognise that Guy Gibson meant no offence 60+ years ago in naming his dog ‘Nigger’.
If true, then this airman has done himself and his fellow brother’s disfavour, and should have duly noted and moved on instead of stirring up the deep routed subject of racism and thereby drawn unwelcomed attention to all ethnic personnel on the station.
Had someone called/referred to this airman as a nigger, then I would standby his grievances, and he should expect to receive an apology or redress. However, if this individual feels so strongly about the innocent naming - so long ago - of a dog belonging to probably the most famous airmen in the RAF’s history, then I would have to question his/her suitability to Armed Forces life.