I doubt there is (although people like Breivik seemed to at least claim to be connected to some sort of "knights templar" conspiracy community), but even if these people are organised only loosely, the platforms they are on still function as echo chambers were they continously gin each other up.

So I think OPs point is still very much valid. When we see isis terrorism or extremism we dismantle their organisations, put the full weight of our intelligence agencies behind it, and hound them to the other end of the world, as we should. But when we encounter extremism and terrorism in our very own communities, we let them joke about it on 4chan and reddit. There is something very wrong about that indifference.

We didn't go after ISIS because of the things they talked about, but because of specific crimes they committed as an entity, or conspired to commit.

And we didn't go after people that share their religion with ISIS (i.e. Salafi extremists), but are not otherwise involved with it, or at least we can't prove that they are.

What do you think is the reason counter-terror forces aren't moving quickly to address white supremacists?

Less experience? I mean until now, white supremacist terrorist attacks haven't been at the forefront of counter-terror forces. Why that may be? is another question altogether.

What do you mean by "at the forefront of counter-terror forces"? Like, they haven't been the most serious threat? Or are a strange new threat?

Essentially not considered that serious.

> Is there an actual organised white supremacist movement behind incidents like this?

I'd have to double check, but I'm not sure that all isis terrorist attacks were done by people who had physically met another isis member--I was under the impression that a number of them were just inspired by propaganda online, similar to so many of the far-right attacks we've seen over the past couple of years.

That's right. There was eventually an effort to inspire and give instructions "lone-wolf" attacks, so that a central organization couldn't be targeted. This is what white supremacists and nationalists are doing today, as it was quite successful for ISIS.

As I understand it, white supremacists and fellow travelers organize in looser groups than ISIS as an entity.

The term Scripted Violence, or Stochastic Terrorism are the terms I've heard, for messaging and ideology that repeatedly creates "lone wolves" with similar views and goals.