It doesnt fuel anything for me beyond humour at the total plot loss this has generated! These are names. They cant hurt you, they don't denigrate you or reduce your value as a person. Why do these names worry you so?
I'm personally not that bothered; what does bother me is that those naming these knew that it would cause a bit of fuss, when really the sensible thing would have been to stay neutral. It's just double standards that annoy me.
Could you give an example of "geographic" names that might be acceptable to you? PLEASE don't just use the usual spottery ones like GOBLIN.
The original names suggested a few years back of Barking Line, East London Line, LEa Valley Line, North London, line, etc. would have been fine.
Or just O1, O2, O3, etc. (probably the most accessible for visitors, and can keep the OVerground 'branding' that everyone is used to).
BTW everything in life is political.
It really isn't, or at least it shouldn't be. Though the Twitterisation of the world is making that harder, personally - if I was in charge - I'd do my best to *avoid* making things look overly political.