Speculation on motive begins immediately when we learn what the target was and the weapons that were used. You can't censor that without censoring the entire incident.
That is as irrelevant as it is correct. Yes, humans speculate, but we shouldn’t be amplifying our known cognitive biases by presenting wild speculation (let alone 4-chan) as if were authoritative truth.
People don’t know what accurate and trustworthy looks like. Even when things are labeled as fiction, they can have an effect - Scotish Independence became more popular when the film “Braveheart” was released, while Islamophobia went up after “American Sniper” was released. Or am I just repeating plausible but fictional urban legends that I’ve mistaken for reality?