I feel like Gene is a control freak. Not being able to control what is said of him elsewhere is probably galling him.
I've noticed in the past he seems obsessed with 'online stalkers'. I think part of that is it gives him someone to blame and lets him play victim. But I think part of it is it does really chap his ass when he can't control the narrative.
Looking at old comments on other places (like comments on Jeremy Vaeni's old blog posts, or the thread about Biedny leaving the Paracast on Tim Binnall's forum), Gene's style was to sail in and attack. And why not? It's not like any actual truth matters to him, he can just deny and lie. Now he has to let the stuff fester out there. And people just keep adding to it!
If he is truly a control freak he is unusual in the sense that most control freaks tend to be quite hard working and conscientious with obsessive compulsive traits. Gene would be the first one who is also terminally lazy.
He is also a real paper tiger who loves throwing his weight around in-spite of the fact that he is a beggar who is trying to ask others for money - not a situation where a rational person would be aggressive.
That makes him a really inept conman.
Most conmen aren't nice people but they are at least able to hold the veneer of charm and friendliness. With Gene the true bile is so close to the surface it is no wonder his grifting is starting to fail.
We have seen how under his own name he tries to portray himself as a kindly old man (albeit badly) but as soon as he gets anonymity/uses a sockpuppet/or direct messages people you get to see what he is really like and it isn't pleasant.
I would not be surprised if when he was younger (and not a decaying corpse held together with second hand string) he would have added physical threats to all this too.
Fits with the MO.