A judge that has no reasonable doubt with this sort of evidence has no business being a judge.
We don't know what defense did in this trial but not picking up on the username mismatch and the assumed non-challenge of the evidence is telling as well.
I am curious if you’ve ever met a judge. Every single one I’ve known was a giant, arrogant, jackass. They aren’t actually (generally) interested in being good at their job, they just like the idea.
In an adversarial system (which the US and Canada and UK are), the judge is not supposed to challenge evidence unless it's glaringly, obviously adrift from reality. That's the job of the defense lawyer. In civil law systems the roles of the judge and prosecutor are combined and responsility for bad decisions is distributed differently.