The only slightly reassuring thing is that this seems to be a fairly US-centric phenomenon. With the NZ shooting an exception. And there was that one shit-head who ran some people over outside a mosque in London (I think?).
Really all points towards sensible gun control laws being the most effective way to keep a lid on the madness.
Yeah Darren Osbourne was the name who ran the van into somebody at Finsbury park.
There are manifestations of it that can be fatal though outside of the US - Jo Cox murder, there was the neo-nazi who wanted to murder labour MP Rosie Cooper with a machete.
MI5 report I think came out saying 30% of "major" terrorist attacks they are foiling are inspired by right wing ideology. A lot of referrals as well to PREVENT for youngsters suspected of right wing radicalism. Now there has been rightly pushback against ISIS/islamist ideology, you won't get Anjum Choudhary, Abu Hamza type of preachers anymore but its been a lot trickier tackling right wing ideology.
Because part of it is sort of mainstream and you don't want to infringe on free speech either.
I don't know how legitimate my worries are, part of it I'll be honest is just concerns by how many upvotes I see some batshit crazy things get on facebook groups. Agreed on the gun control/gun culture part especially in terms of preventing mass-shooter type events inspired by such things but the effect of en-masse propagation. Without wanting to seem like I'm endorsing thought-policing, belief in extremist conspiracy theory -based far right ideology unchecked I think will result in societal consequences outside of just terrorist events even though its more difficult to quantify.