Bottom Line:
This does matter, I can tell you from people I've tried to turn into Ron Paul supporters, its a dealbreaker with the left, and those on the right use it as an excuse to confirm the idea that Ron Paul is unelectable it hurts on BOTH SIDES, and it also hurts because there hasn't been a decent response and "I hadn't read it" when there is video of his discussing the newsletters and a interview of him defending passages from 1995 makes it hard to convince people who arn't following close as we are.
This articles does more damage because it doesn't really paint Ron Paul as racist, I think the article clears him on that charge but paints him as someone who profited from racism intentionally which is a worse charge. Plus, pointing out the debt he had out of his senate run which was six figures it's easy for someone to understand how someone might act in desperation to pay something like that off and then hard to say to stop it when you see the good you do with the money elsewhere.
This is damaging stuff, doesn't hurt my opinion or enthusiasm regarding Paul, but people who casual observers will be put off by the idea that even Ron Paul succumbed to the pressures of debt.
I'm not sure what's true and what isn't and of course I realiz donderos testimony is suspect, but there is a lot of other stuff and I've heard very little in the way a plausible response...
Ron Paul is Ron Paul, and either way that doesn't change, but we just brush this off at our own peril if we are in this to win, which many are