Friends? Oh goodness, are we in the playground now?
Anyway, all nicknames are rude if the person hasn't agreed to their use and I will criticise them all if I am in a conversation where it is relevant to do so. I have certainly on several occasions said it is inappropriate to call the PM anything but Johnson or Boris Johnson.
And well, the possible racism in the nicknaming of Mr Scobie....you won't agree, but never mind. The nickname is used because you find his real name funny and difficult to assimilate with your day-to-day understanding of how people should be named. Calling him by another name is a way of minimising his importance and poking fun at him.
I'd never heard of him until yesterday, BTW. Strange, given that he is all over the news....
Casdon, that made me laugh!