Someone who is clearly unaware of the use of margarine in baking

I can appreciate the sentiment, but I will say that here in the UK (and other places in Europe), we have a Remembrance Day which honours all the dead of war, civilians and service personnel included, so it can be done. Anecdotal, but personally I've never met someone who has served that resents it not just being about those who served.

A person can be British, in which case they are a Briton