The other thing is, I think you have the wrong idea about "what about". The tactic is used to divert attention from a major news item or serious blunder. What the opposition may have done 3 years ago hardly warrants the major or serious category. Your suggestion that we should be talking about it as much as current news is risible. It reminds me of a quote I saw the other day.

"Now we have the view of an expert in the field who has spent years studying the subject and, for the sake of balance, the ramblings of someone who read about it on Facebook."