Yes, of course an established newspaper is more credible than an anonymous online user.
But it's also not just about who gets the benefit of the doubt. The facts available so far do not fit easily into a plausible story that would justify the police actions: we would need explanations for why the paper would be committing identity theft and computer hacking crimes to report on matters of public record, why the paper would claim to have reached out to police rather than publish damaging information, why the paper was raided but nobody was arrested or charged with any crimes.
On the other hand, the available facts do fit easily into a plausible story of cronyism and incompetence. It's a lot easier to believe that the local officials were being overzealous in pursuit of someone they perceived to be trying to damage the reputation of someone politically connected. The unanswered questions here are more about which plausible explanation is correct: are the police trying to build a case against the paper, or against the paper's confidential source?