The correct response is for the government to treat domestic terrorists, and preachers of hate the same way that they treat foreign ones.
Anwar Al-Awlaki, and his son were the targets of a US drone strikes for the same thing - radicalizing speech, and inciting terrorist attacks. Yet, here we have an entire ecosystem of alt-right radicalization, inciting terrorist attacks, and the government doesn't lift a single finger to deal with it.
So the right wing white supremacist problem, at least in the U.S., has been taken seriously; but with political change it has been taken less seriously by the current administration, for entirely predictable reasons. Whether FBI takes it seriously enough is an open question, but when intelligence agencies publicly list threats to the U.S., the southern border is not on the list, but right wing white supremacist hate groups are.
There is a very real issue that until there is planning or solicitation to commit violence, right wing white supremacy is legal freedom of association, and hate speech is still protected speech, so long as it's not in the gray area of "fighting words". I think it's completely reasonable for FBI to infiltrate violence prone hate groups by paying informants and putting agents on the inside. I also have no problem with enduring warrants on leader organizers of such individuals for wire tapping. What they want is a race war. They want to destabilize the country. It's not a new thing.
ADL and Southern Poverty Law Center have been tracking hate groups for a long time, both left wing and right wing. It just so happens right now it's overwhelmingly right wing hate groups out there. And it would not surprise me if the more violent prone ones would love to see successful recruitment of left wing groups, because they can't really have a race war, or make real their romantic notions of a civil war 2.0, with just a bunch of right wing groups. They have to incite the left to attack, or they've got nothing.
Watch it. It represents the horrible truth of the elevated sense of Islamophobia and its tragic consequences. People shouldn't look away from this. Many of us have to deal with this on a daily basis. When it gets so out of control that it creeps up into the privileged world people want to look away. Don't forget that today's global structure is based on widespread massacres and genocide. This extreme comes from overlooking a racist, bigoted status quo much like an infestation comes from overlooking the first signs of insects. We may be looking away from your history too. Looking away is not going to change things. I don't care if it makes us feel bad. Its the truth. We need to deal with it because others have to.
Basically most of us sit there and tolerate minor (and sometimes major) forms of racism and do nothing only to act shocked when something like this happens. Its a psychological game played to avoid guilt and responsibility.
There's a difference between looking at it and saying we must do better and looking away.
However I'm very uncomfortable with sties like liveleak being fully censored on NZ ISPs. I was unable to access liveleak.com at all from the few hours after the event, up to and including now.
It sets a bad precedent and while I hope no one sees that video, the content itself is not illegal and we should not be censoring it as a kneejerk reaction. People who go to LiveLeak know what they're going to get.