Sitting in the jury of social media, is very different to sitting in the jury of an actual trial.
The jurors were informed of the law, of what 'beyond all reasonable doubt' actually means (an incredibly high burden of proof), and that the onus was on the prosecution to prove the guilt of the accused, not on the defence to prove the accused's innocence. They have sat through hours of evidence, by both sides.
I think it's highly probable that most jurors would have been biassed towards finding guilt, if they could, within the terms of their duty, the law as it was explained to them, and the evidence put in front of them. But it is an incredibly high threshold, and if there is a reasonable doubt, then a verdict of innocent must be found. And for murder over here, intent must be proven. It cannot be assumed.