Earlier quoted context omitted.
DDoS’ing is quite different from just turning your back on someone. It’s more akin to following someone around with a megaphone and shouting over everything they say so no one can hear them. Sure, you might celebrate when that’s done to someone you dislike, but a lot less appealing if you imagine it done to a cause you agree with.
Also, DDoS is a crime. Saying racist things isn't. We shouldn't blur the line here.
Kiwi Farms absolutely incited imminent criminal activity (harassment, among other things) and made lots of specific threats against specifically targeted people and groups.
This is a false equivalence.