You specifically decided to label one proposing an unwelcome data point as "climate change denier", which in an instant made your position clear, hence my reply.
I assume that means you're unaware of the historical meaning behind the quote: http://en.wikipedia.org/wiki/And_you_are_lynching_Negroes
The fallacy in question is also known as "tu quoque".
Edit: Also, it's interesting how often I point out a fallacy in someone's reasoning, only to have them say "there's no fallacy". In virtually every case, the situation was that they simply didn't see the fallacy. A better answer would be "I don't see the fallacy you're talking about."