Well, the threats were made publicly over twitter. Brianna screen shotted them and tweeted them. Is there any claim that "no, there are other, privately delivered threats that are of a different nature than these?"
So, we've seen the threats. "I, anonymous person on the internet likely several states away from you am going to drop everything, drive to your house and commit murder because I hate feminist opinions on video games!"
Really? Because that happens? People do that?
There is a difference between protected free speech (even though vile and repugnant as this) and a "true threat," which is actually a crime. There is no hard and fast formula for what a true threat is, and it varies by jurisdiction. It's a "preponderance of circumstances" kind of thing. Lots of little boxes you can check off that, taken together, can add up to a true threat.
Are the speaker and the victim acquainted in any way? I'll take a threat from a jilted ex or a business partner far more seriously than a random stranger.
How serious is the nature of their dispute? Personal grievances, like a messy divorce, or political power issues, like threats against a politician or judge I'll take more seriously than those against a random person with no power or authority over a general and nebulous issue like "gender politics in video games."
Does the threatener have any ability to carry out the threat? In what proximity to the victim are they? While we don't know the location of the threatener, given that the vast majority of people on the internet are nowhere near you, it's unlikely the threatener had any ability to carry out the threat.
Does the threatener have any kind of history of violence? I'd take a threat from ISIS over depictions of Muhammad seriously, or threats by skinheads against federal judges trying a racially sensitive case. People in or associated with their groups have actually done these things in the past. But gamers? They do nothing. I mean, literally, they do nothing. They sit on the couch and mash buttons and do nothing constructive or destructive at all. They are inert masses. But they sure do talk! If .00001% of the threats of rape and murder communicated over XBox Live were carried out, the streets would be ankle deep in blood.
So, here you've got a random stranger, unknown to Wu, not personally jilted but politically motivated, who is likely states away from her and completely unable to act, publicly announcing that they are going to commit rape and murder over gender politics in video games, as a representative of a group of people who say 12 horrific things to strangers every day before breakfast and never actually do a damn thing.
On what planet would any reasonable person take that seriously?
In investigating, you also have to ask "cui bono?" Who benefits? Making such a threat advances exactly whose agenda? The FBI is doing nothing because they believe in all likelihood she made the thing up herself, creating a throwaway twitter account that did nothing but spew a single scripted set of death threats. But they can't prove it was her so they're not going to prosecute her for making a false claim, but can't say "we think it was her" and embarrass somebody, discouraging actual victims from reporting crimes, without proof. They'll find "the real threatener" right about the time O.J. finds "the real killers." Why would she do that? Well, she has a history of histrionics on a transgender forum, so she's not exactly the most stable of people, and sure has benefited monetarily from the attention.
And absolutely no one, not a single person, is coming to hurt her.
If when the entire facade completely collapses (they always do eventually...I've seen this same kind of manufactured persona and outrage in another industry), will you recant your position?