In this context I believe "plotting genocide" probably refers to the participation in an explicitly white supremacist / Nazi organization. But you knew that, which is why you felt the need to introduce a totally separate situation to argue about.
But no, let's return to the original claim - we are to believe every one (or at least most) of the doxing victims were "plotting genocide", they weren't just trying to stop immigration to Sweden? Based on what?
Even the Nordic Resistance Movement [1], the only far-right terrorist organization mentioned in the article, and which this online shop is merely "linked to" (according to AFA Sweden), are only against immigration - their wiki page has zero mentions of genocide or expansionism.
If we applied these skewed "standards" to the AFA itself, they would also be plotting genocide, a mass famine to break Sweden's national resistance, akin to the Holodomor. But of course the guilt by association and demonization only ever go one way.
[1] https://en.wikipedia.org/wiki/Nordic_Resistance_Movement
No, neo-Nazis, nor people "merely" linking to neo-Nazis, nor people "just asking questions," none of them are covered by the same social contract that makes doxxing students wrong. When people decide to break the social contract by choosing Naziism, they are no longer covered.
This is three layers of guilt by association, and you have not substantiated even one.
You may continue on to the Wiki page on neo-Nazis to familiarize yourself with their ideology, if you'd like. You can go to the page you linked and click "neo-Nazi," in the first sentence and read all about that.
But that same source describes their ideology directly. That description contains no calls to genocide (and wikipedia would not omit such calls). But you're not alleging they called for genocide - you're alleging people that shopped on a website that is linked [1] to them called for genocide.
[1] Again, allegedly linked, an allegation made by a literal by-any-definition terrorist organization.