I'm sorry you feel insulted.
But, how can you consider it good role playing to ignore a pretty fundamental element of a character?
Again, why make a choice with your character and NEVER bring it to the table? How is it good role playing to make any choice (not just race) and then never, ever bring it to the table?
You don't need to focus on it, you don't need to weave it into the fabric of your existence. But, IMO, you do need to make everyone aware of it in order to have a well rounded character portrayal. At least to the point where no one is shocked to discover that you are whatever you are. If six months into a campaign, one of the players turns to you and says, "You're a what? Since when?" then that's a pretty serious failing in role play.
And you can replace the what with anything - race, gender, whatever.
To be 100% honest, I don't understand how ignoring character elements can be considered good role playing? How far does that go? At what point does it become bad roleplaying? If I never bother to portray anything about my character and simply use him as an avatar in the game world, that would be considered bad role play.
To me, if it's on your character sheet, it should come out some time during the campaign. It doesn't matter if it's race, gender, character background, whatever. If it doesn't hit the table, it's just wasted space and opportunity.
I've always wondered though, why is it only elf players who do this? No one else seems to have any problems conveying race. It's only the people, IME, who play elves (to be honest, Omyn's the first half-elf I can remember seeing in a VERY long time. 2e era to be certain.

Least played race after gnomes IME)