I'm not sure I follow. It sounds like you're blaming blogs and online media for the decline in credibility of newspapers.

Newspapers aren't credible anymore because they continuously make the conscious decision to run bullshit stories full of twisted truths in the pursuit of sales, as they have always done. The only reason they had any credibility before is because people blindly accepted what they said without the tools to verify it.

They've had the same amount of journalistic integrity as they've always had. I.E plenty until there's a buck to be made by forgoing it.