> Inconveniencing a people, by taking down a website is not violence or intimidation.
The intent of the DDoS in question is very clearly a form of intimidation. DDoS in general does cause real economic harm and not merely inconvenience.
> Keep in mind who you're defending here.
That's irrelevant. Murdering Nazis is still wrong and illegal.
> The site in question doxxes trans people so they can be harassed and sent death threats. That IS terrorism.
If it were they would have been charged. You're imputing intent and actions without sufficient evidence, because if that evidence existed we wouldn't even be having this conversation. Extra-judicial actions of this sort, no matter how plausibly justified, are not how society works. We have laws and a justice system because mob "justice" is wrong.